diff --git a/api/cosmos/distribution/v1beta1/distribution.pulsar.go b/api/cosmos/distribution/v1beta1/distribution.pulsar.go
index 856240f07509..2abeacdb23b5 100644
--- a/api/cosmos/distribution/v1beta1/distribution.pulsar.go
+++ b/api/cosmos/distribution/v1beta1/distribution.pulsar.go
@@ -6602,11 +6602,14 @@ type Params struct {
 	unknownFields protoimpl.UnknownFields
 
 	CommunityTax string `protobuf:"bytes,1,opt,name=community_tax,json=communityTax,proto3" json:"community_tax,omitempty"`
-	// The base_proposer_reward and bonus_proposer_reward fields are deprecated
-	// and are no longer used in the x/distribution module's reward mechanism.
+	// Deprecated: The base_proposer_reward field is deprecated and is no longer used
+	// in the x/distribution module's reward mechanism.
 	//
 	// Deprecated: Do not use.
 	BaseProposerReward string `protobuf:"bytes,2,opt,name=base_proposer_reward,json=baseProposerReward,proto3" json:"base_proposer_reward,omitempty"`
+	// Deprecated: The bonus_proposer_reward field is deprecated and is no longer used
+	// in the x/distribution module's reward mechanism.
+	//
 	// Deprecated: Do not use.
 	BonusProposerReward string `protobuf:"bytes,3,opt,name=bonus_proposer_reward,json=bonusProposerReward,proto3" json:"bonus_proposer_reward,omitempty"`
 	WithdrawAddrEnabled bool   `protobuf:"varint,4,opt,name=withdraw_addr_enabled,json=withdrawAddrEnabled,proto3" json:"withdraw_addr_enabled,omitempty"`
diff --git a/proto/cosmos/distribution/v1beta1/distribution.proto b/proto/cosmos/distribution/v1beta1/distribution.proto
index cbebaa14feec..9ffd6132fdb8 100644
--- a/proto/cosmos/distribution/v1beta1/distribution.proto
+++ b/proto/cosmos/distribution/v1beta1/distribution.proto
@@ -19,14 +19,17 @@ message Params {
     (gogoproto.nullable)   = false
   ];
 
-  // The base_proposer_reward and bonus_proposer_reward fields are deprecated
-  // and are no longer used in the x/distribution module's reward mechanism.
+  // Deprecated: The base_proposer_reward field is deprecated and is no longer used
+  // in the x/distribution module's reward mechanism.
   string base_proposer_reward = 2 [
     (cosmos_proto.scalar)  = "cosmos.Dec",
     (gogoproto.customtype) = "github.com/cosmos/cosmos-sdk/types.Dec",
     (gogoproto.nullable)   = false,
     deprecated             = true
   ];
+
+  // Deprecated: The bonus_proposer_reward field is deprecated and is no longer used
+  // in the x/distribution module's reward mechanism.
   string bonus_proposer_reward = 3 [
     (cosmos_proto.scalar)  = "cosmos.Dec",
     (gogoproto.customtype) = "github.com/cosmos/cosmos-sdk/types.Dec",
diff --git a/tests/e2e/distribution/suite.go b/tests/e2e/distribution/suite.go
index eaab5a4c0a39..00b7884ab879 100644
--- a/tests/e2e/distribution/suite.go
+++ b/tests/e2e/distribution/suite.go
@@ -80,13 +80,13 @@ func (s *E2ETestSuite) TestGetCmdQueryParams() {
 		{
 			"json output",
 			[]string{fmt.Sprintf("--%s=json", flags.FlagOutput)},
-			`{"community_tax":"0.020000000000000000","base_proposer_reward":"0.010000000000000000","bonus_proposer_reward":"0.040000000000000000","withdraw_addr_enabled":true}`,
+			`{"community_tax":"0.020000000000000000","base_proposer_reward":"0.000000000000000000","bonus_proposer_reward":"0.000000000000000000","withdraw_addr_enabled":true}`,
 		},
 		{
 			"text output",
 			[]string{fmt.Sprintf("--%s=text", flags.FlagOutput)},
-			`base_proposer_reward: "0.010000000000000000"
-bonus_proposer_reward: "0.040000000000000000"
+			`base_proposer_reward: "0.000000000000000000"
+bonus_proposer_reward: "0.000000000000000000"
 community_tax: "0.020000000000000000"
 withdraw_addr_enabled: true`,
 		},
diff --git a/tests/fixtures/adr-024-coin-metadata_genesis.json b/tests/fixtures/adr-024-coin-metadata_genesis.json
index d56ed836fa89..ecedfd67cb7c 100644
--- a/tests/fixtures/adr-024-coin-metadata_genesis.json
+++ b/tests/fixtures/adr-024-coin-metadata_genesis.json
@@ -172,8 +172,8 @@
     "distribution": {
       "params": {
         "community_tax": "0.020000000000000000",
-        "base_proposer_reward": "0.010000000000000000",
-        "bonus_proposer_reward": "0.040000000000000000",
+        "base_proposer_reward": "0.000000000000000000",
+        "bonus_proposer_reward": "0.000000000000000000",
         "withdraw_addr_enabled": true
       },
       "fee_pool": {
diff --git a/tests/integration/distribution/keeper/common_test.go b/tests/integration/distribution/keeper/common_test.go
index f5d7ff33b858..4ab7cead571a 100644
--- a/tests/integration/distribution/keeper/common_test.go
+++ b/tests/integration/distribution/keeper/common_test.go
@@ -15,7 +15,6 @@ var (
 	valConsPk2 = PKS[2]
 
 	valConsAddr0 = sdk.ConsAddress(valConsPk0.Address())
-	valConsAddr1 = sdk.ConsAddress(valConsPk1.Address())
 
 	distrAcc = authtypes.NewEmptyModuleAccount(types.ModuleName)
 )
diff --git a/tests/integration/distribution/keeper/grpc_query_test.go b/tests/integration/distribution/keeper/grpc_query_test.go
index 594d319d5c1a..6074126b0956 100644
--- a/tests/integration/distribution/keeper/grpc_query_test.go
+++ b/tests/integration/distribution/keeper/grpc_query_test.go
@@ -95,8 +95,8 @@ func (suite *KeeperTestSuite) TestGRPCParams() {
 			func() {
 				params = types.Params{
 					CommunityTax:        sdk.NewDecWithPrec(3, 1),
-					BaseProposerReward:  sdk.NewDecWithPrec(2, 1),
-					BonusProposerReward: sdk.NewDecWithPrec(1, 1),
+					BaseProposerReward:  sdk.ZeroDec(),
+					BonusProposerReward: sdk.ZeroDec(),
 					WithdrawAddrEnabled: true,
 				}
 
@@ -117,7 +117,7 @@ func (suite *KeeperTestSuite) TestGRPCParams() {
 			if testCase.expPass {
 				suite.Require().NoError(err)
 				suite.Require().NotNil(paramsRes)
-				suite.Require().Equal(paramsRes.Params, expParams)
+				suite.Require().Equal(expParams, paramsRes.Params)
 			} else {
 				suite.Require().Error(err)
 			}
diff --git a/tests/integration/distribution/keeper/msg_server_test.go b/tests/integration/distribution/keeper/msg_server_test.go
index cdee1d04bdf4..7fd0963822ac 100644
--- a/tests/integration/distribution/keeper/msg_server_test.go
+++ b/tests/integration/distribution/keeper/msg_server_test.go
@@ -12,9 +12,7 @@ import (
 
 func (s *KeeperTestSuite) TestMsgUpdateParams() {
 	// default params
-	communityTax := sdk.NewDecWithPrec(2, 2)        // 2%
-	baseProposerReward := sdk.NewDecWithPrec(1, 2)  // 1%
-	bonusProposerReward := sdk.NewDecWithPrec(4, 2) // 4%
+	communityTax := sdk.NewDecWithPrec(2, 2) // 2%
 	withdrawAddrEnabled := true
 
 	testCases := []struct {
@@ -29,9 +27,9 @@ func (s *KeeperTestSuite) TestMsgUpdateParams() {
 				Authority: "invalid",
 				Params: types.Params{
 					CommunityTax:        sdk.NewDecWithPrec(2, 0),
-					BaseProposerReward:  baseProposerReward,
-					BonusProposerReward: bonusProposerReward,
 					WithdrawAddrEnabled: withdrawAddrEnabled,
+					BaseProposerReward:  sdk.ZeroDec(),
+					BonusProposerReward: sdk.ZeroDec(),
 				},
 			},
 			expErr:    true,
@@ -43,9 +41,9 @@ func (s *KeeperTestSuite) TestMsgUpdateParams() {
 				Authority: s.distrKeeper.GetAuthority(),
 				Params: types.Params{
 					CommunityTax:        sdk.NewDecWithPrec(2, 0),
-					BaseProposerReward:  baseProposerReward,
-					BonusProposerReward: bonusProposerReward,
 					WithdrawAddrEnabled: withdrawAddrEnabled,
+					BaseProposerReward:  sdk.ZeroDec(),
+					BonusProposerReward: sdk.ZeroDec(),
 				},
 			},
 			expErr:    true,
@@ -57,69 +55,41 @@ func (s *KeeperTestSuite) TestMsgUpdateParams() {
 				Authority: s.distrKeeper.GetAuthority(),
 				Params: types.Params{
 					CommunityTax:        sdk.NewDecWithPrec(-2, 1),
-					BaseProposerReward:  baseProposerReward,
-					BonusProposerReward: bonusProposerReward,
 					WithdrawAddrEnabled: withdrawAddrEnabled,
+					BaseProposerReward:  sdk.ZeroDec(),
+					BonusProposerReward: sdk.ZeroDec(),
 				},
 			},
 			expErr:    true,
 			expErrMsg: "community tax should be non-negative and less than one",
 		},
 		{
-			name: "base proposer reward > 1",
+			name: "base proposer reward set",
 			input: &types.MsgUpdateParams{
 				Authority: s.distrKeeper.GetAuthority(),
 				Params: types.Params{
 					CommunityTax:        communityTax,
-					BaseProposerReward:  sdk.NewDecWithPrec(2, 0),
-					BonusProposerReward: bonusProposerReward,
+					BaseProposerReward:  sdk.NewDecWithPrec(1, 2),
+					BonusProposerReward: sdk.ZeroDec(),
 					WithdrawAddrEnabled: withdrawAddrEnabled,
 				},
 			},
 			expErr:    true,
-			expErrMsg: "sum of base, bonus proposer rewards, and community tax cannot be greater than one",
+			expErrMsg: "cannot update base or bonus proposer reward because these are deprecated fields: invalid request",
 		},
 		{
-			name: "negative base proposer reward",
+			name: "bonus proposer reward set",
 			input: &types.MsgUpdateParams{
 				Authority: s.distrKeeper.GetAuthority(),
 				Params: types.Params{
 					CommunityTax:        communityTax,
-					BaseProposerReward:  sdk.NewDecWithPrec(-2, 0),
-					BonusProposerReward: bonusProposerReward,
+					BaseProposerReward:  sdk.ZeroDec(),
+					BonusProposerReward: sdk.NewDecWithPrec(1, 2),
 					WithdrawAddrEnabled: withdrawAddrEnabled,
 				},
 			},
 			expErr:    true,
-			expErrMsg: "base proposer reward should be positive",
-		},
-		{
-			name: "bonus proposer reward > 1",
-			input: &types.MsgUpdateParams{
-				Authority: s.distrKeeper.GetAuthority(),
-				Params: types.Params{
-					CommunityTax:        communityTax,
-					BaseProposerReward:  baseProposerReward,
-					BonusProposerReward: sdk.NewDecWithPrec(2, 0),
-					WithdrawAddrEnabled: withdrawAddrEnabled,
-				},
-			},
-			expErr:    true,
-			expErrMsg: "sum of base, bonus proposer rewards, and community tax cannot be greater than one",
-		},
-		{
-			name: "negative bonus proposer reward",
-			input: &types.MsgUpdateParams{
-				Authority: s.distrKeeper.GetAuthority(),
-				Params: types.Params{
-					CommunityTax:        communityTax,
-					BaseProposerReward:  baseProposerReward,
-					BonusProposerReward: sdk.NewDecWithPrec(-2, 0),
-					WithdrawAddrEnabled: withdrawAddrEnabled,
-				},
-			},
-			expErr:    true,
-			expErrMsg: "bonus proposer reward should be positive",
+			expErrMsg: "cannot update base or bonus proposer reward because these are deprecated fields: invalid request",
 		},
 		{
 			name: "all good",
@@ -127,8 +97,8 @@ func (s *KeeperTestSuite) TestMsgUpdateParams() {
 				Authority: s.distrKeeper.GetAuthority(),
 				Params: types.Params{
 					CommunityTax:        communityTax,
-					BaseProposerReward:  baseProposerReward,
-					BonusProposerReward: bonusProposerReward,
+					BaseProposerReward:  sdk.ZeroDec(),
+					BonusProposerReward: sdk.ZeroDec(),
 					WithdrawAddrEnabled: withdrawAddrEnabled,
 				},
 			},
diff --git a/tests/integration/distribution/keeper/params_test.go b/tests/integration/distribution/keeper/params_test.go
deleted file mode 100644
index 16ae36d69fee..000000000000
--- a/tests/integration/distribution/keeper/params_test.go
+++ /dev/null
@@ -1,117 +0,0 @@
-package keeper_test
-
-import (
-	sdk "github.com/cosmos/cosmos-sdk/types"
-	"github.com/cosmos/cosmos-sdk/x/distribution/types"
-)
-
-func (s *KeeperTestSuite) TestParams() {
-	// default params
-	communityTax := sdk.NewDecWithPrec(2, 2)        // 2%
-	baseProposerReward := sdk.NewDecWithPrec(1, 2)  // 1%
-	bonusProposerReward := sdk.NewDecWithPrec(4, 2) // 4%
-	withdrawAddrEnabled := true
-
-	testCases := []struct {
-		name      string
-		input     types.Params
-		expErr    bool
-		expErrMsg string
-	}{
-		{
-			name: "community tax > 1",
-			input: types.Params{
-				CommunityTax:        sdk.NewDecWithPrec(2, 0),
-				BaseProposerReward:  baseProposerReward,
-				BonusProposerReward: bonusProposerReward,
-				WithdrawAddrEnabled: withdrawAddrEnabled,
-			},
-			expErr:    true,
-			expErrMsg: "community tax should be non-negative and less than one",
-		},
-		{
-			name: "negative community tax",
-			input: types.Params{
-				CommunityTax:        sdk.NewDecWithPrec(-2, 1),
-				BaseProposerReward:  baseProposerReward,
-				BonusProposerReward: bonusProposerReward,
-				WithdrawAddrEnabled: withdrawAddrEnabled,
-			},
-			expErr:    true,
-			expErrMsg: "community tax should be non-negative and less than one",
-		},
-		{
-			name: "base proposer reward > 1",
-			input: types.Params{
-				CommunityTax:        communityTax,
-				BaseProposerReward:  sdk.NewDecWithPrec(2, 0),
-				BonusProposerReward: bonusProposerReward,
-				WithdrawAddrEnabled: withdrawAddrEnabled,
-			},
-			expErr:    true,
-			expErrMsg: "sum of base, bonus proposer rewards, and community tax cannot be greater than one",
-		},
-		{
-			name: "negative base proposer reward",
-			input: types.Params{
-				CommunityTax:        communityTax,
-				BaseProposerReward:  sdk.NewDecWithPrec(-2, 0),
-				BonusProposerReward: bonusProposerReward,
-				WithdrawAddrEnabled: withdrawAddrEnabled,
-			},
-			expErr:    true,
-			expErrMsg: "base proposer reward should be positive",
-		},
-		{
-			name: "bonus proposer reward > 1",
-			input: types.Params{
-				CommunityTax:        communityTax,
-				BaseProposerReward:  baseProposerReward,
-				BonusProposerReward: sdk.NewDecWithPrec(2, 0),
-				WithdrawAddrEnabled: withdrawAddrEnabled,
-			},
-			expErr:    true,
-			expErrMsg: "sum of base, bonus proposer rewards, and community tax cannot be greater than one",
-		},
-		{
-			name: "negative bonus proposer reward",
-			input: types.Params{
-				CommunityTax:        communityTax,
-				BaseProposerReward:  baseProposerReward,
-				BonusProposerReward: sdk.NewDecWithPrec(-2, 0),
-				WithdrawAddrEnabled: withdrawAddrEnabled,
-			},
-			expErr:    true,
-			expErrMsg: "bonus proposer reward should be positive",
-		},
-		{
-			name: "all good",
-			input: types.Params{
-				CommunityTax:        communityTax,
-				BaseProposerReward:  baseProposerReward,
-				BonusProposerReward: bonusProposerReward,
-				WithdrawAddrEnabled: withdrawAddrEnabled,
-			},
-			expErr: false,
-		},
-	}
-
-	for _, tc := range testCases {
-		tc := tc
-		s.Run(tc.name, func() {
-			expected := s.distrKeeper.GetParams(s.ctx)
-			err := s.distrKeeper.SetParams(s.ctx, tc.input)
-
-			if tc.expErr {
-				s.Require().Error(err)
-				s.Require().Contains(err.Error(), tc.expErrMsg)
-			} else {
-				expected = tc.input
-				s.Require().NoError(err)
-			}
-
-			params := s.distrKeeper.GetParams(s.ctx)
-			s.Require().Equal(expected, params)
-		})
-	}
-}
diff --git a/x/bank/simulation/genesis_test.go b/x/bank/simulation/genesis_test.go
index 69e1a6923455..55d19f804977 100644
--- a/x/bank/simulation/genesis_test.go
+++ b/x/bank/simulation/genesis_test.go
@@ -41,7 +41,7 @@ func TestRandomizedGenState(t *testing.T) {
 	simState.Cdc.MustUnmarshalJSON(simState.GenState[types.ModuleName], &bankGenesis)
 
 	assert.Equal(t, true, bankGenesis.Params.GetDefaultSendEnabled(), "Params.GetDefaultSendEnabled")
-	assert.Len(t, bankGenesis.Params.GetSendEnabled(), 0, "Params.GetSendEnabled") //nolint:staticcheck // SA1019: Params.GetSendEnabled is deprecated: use SendEnabled instead.
+	assert.Len(t, bankGenesis.Params.GetSendEnabled(), 0, "Params.GetSendEnabled") //nolint:staticcheck
 	if assert.Len(t, bankGenesis.Balances, 3) {
 		assert.Equal(t, "cosmos1ghekyjucln7y67ntx7cf27m9dpuxxemn4c8g4r", bankGenesis.Balances[2].GetAddress().String(), "Balances[2] address")
 		assert.Equal(t, "1000stake", bankGenesis.Balances[2].GetCoins().String(), "Balances[2] coins")
diff --git a/x/distribution/README.md b/x/distribution/README.md
index 52d3acbb601e..7b96e1ae2fbf 100644
--- a/x/distribution/README.md
+++ b/x/distribution/README.md
@@ -512,12 +512,10 @@ The distribution module contains the following parameters:
 | Key                 | Type         | Example                    |
 | ------------------- | ------------ | -------------------------- |
 | communitytax        | string (dec) | "0.020000000000000000" [0] |
-| baseproposerreward  | string (dec) | "0.010000000000000000" [0] |
-| bonusproposerreward | string (dec) | "0.040000000000000000" [0] |
 | withdrawaddrenabled | bool         | true                       |
 
-* [0] `communitytax`, `baseproposerreward` and `bonusproposerreward` must be
-  positive and their sum cannot exceed 1.00.
+* [0] `communitytax` must be positive and cannot exceed 1.00.
+* `baseproposerreward` and `bonusproposerreward` were parameters that are deprecated in v0.47 and are not used.
 
 ## Client
 
@@ -594,8 +592,8 @@ simd query distribution params
 Example Output:
 
 ```yml
-base_proposer_reward: "0.010000000000000000"
-bonus_proposer_reward: "0.040000000000000000"
+base_proposer_reward: "0.000000000000000000"
+bonus_proposer_reward: "0.000000000000000000"
 community_tax: "0.020000000000000000"
 withdraw_addr_enabled: true
 ```
@@ -781,8 +779,8 @@ Example Output:
 {
   "params": {
     "communityTax": "20000000000000000",
-    "baseProposerReward": "10000000000000000",
-    "bonusProposerReward": "40000000000000000",
+    "baseProposerReward": "00000000000000000",
+    "bonusProposerReward": "00000000000000000",
     "withdrawAddrEnabled": true
   }
 }
diff --git a/x/distribution/keeper/msg_server.go b/x/distribution/keeper/msg_server.go
index 5b81f256e339..f9e87eb8265c 100644
--- a/x/distribution/keeper/msg_server.go
+++ b/x/distribution/keeper/msg_server.go
@@ -120,6 +120,11 @@ func (k msgServer) UpdateParams(goCtx context.Context, req *types.MsgUpdateParam
 		return nil, errors.Wrapf(govtypes.ErrInvalidSigner, "invalid authority; expected %s, got %s", k.authority, req.Authority)
 	}
 
+	if (!req.Params.BaseProposerReward.IsNil() && !req.Params.BaseProposerReward.IsZero()) || //nolint:staticcheck
+		(!req.Params.BonusProposerReward.IsNil() && !req.Params.BonusProposerReward.IsZero()) { //nolint:staticcheck
+		return nil, errors.Wrapf(errors.ErrInvalidRequest, "cannot update base or bonus proposer reward because these are deprecated fields")
+	}
+
 	ctx := sdk.UnwrapSDKContext(goCtx)
 	if err := k.SetParams(ctx, req.Params); err != nil {
 		return nil, err
diff --git a/x/distribution/keeper/params_test.go b/x/distribution/keeper/params_test.go
index 46c433d41ddc..af4b40b68740 100644
--- a/x/distribution/keeper/params_test.go
+++ b/x/distribution/keeper/params_test.go
@@ -40,9 +40,7 @@ func TestParams(t *testing.T) {
 	)
 
 	// default params
-	communityTax := sdk.NewDecWithPrec(2, 2)        // 2%
-	baseProposerReward := sdk.NewDecWithPrec(1, 2)  // 1%
-	bonusProposerReward := sdk.NewDecWithPrec(4, 2) // 4%
+	communityTax := sdk.NewDecWithPrec(2, 2) // 2%
 	withdrawAddrEnabled := true
 
 	testCases := []struct {
@@ -55,8 +53,8 @@ func TestParams(t *testing.T) {
 			name: "community tax > 1",
 			input: types.Params{
 				CommunityTax:        sdk.NewDecWithPrec(2, 0),
-				BaseProposerReward:  baseProposerReward,
-				BonusProposerReward: bonusProposerReward,
+				BaseProposerReward:  sdk.ZeroDec(),
+				BonusProposerReward: sdk.ZeroDec(),
 				WithdrawAddrEnabled: withdrawAddrEnabled,
 			},
 			expErr:    true,
@@ -66,8 +64,8 @@ func TestParams(t *testing.T) {
 			name: "negative community tax",
 			input: types.Params{
 				CommunityTax:        sdk.NewDecWithPrec(-2, 1),
-				BaseProposerReward:  baseProposerReward,
-				BonusProposerReward: bonusProposerReward,
+				BaseProposerReward:  sdk.ZeroDec(),
+				BonusProposerReward: sdk.ZeroDec(),
 				WithdrawAddrEnabled: withdrawAddrEnabled,
 			},
 			expErr:    true,
@@ -77,52 +75,30 @@ func TestParams(t *testing.T) {
 			name: "base proposer reward > 1",
 			input: types.Params{
 				CommunityTax:        communityTax,
-				BaseProposerReward:  sdk.NewDecWithPrec(2, 0),
-				BonusProposerReward: bonusProposerReward,
+				BaseProposerReward:  sdk.NewDecWithPrec(1, 2),
+				BonusProposerReward: sdk.ZeroDec(),
 				WithdrawAddrEnabled: withdrawAddrEnabled,
 			},
-			expErr:    true,
-			expErrMsg: "sum of base, bonus proposer rewards, and community tax cannot be greater than one",
-		},
-		{
-			name: "negative base proposer reward",
-			input: types.Params{
-				CommunityTax:        communityTax,
-				BaseProposerReward:  sdk.NewDecWithPrec(-2, 0),
-				BonusProposerReward: bonusProposerReward,
-				WithdrawAddrEnabled: withdrawAddrEnabled,
-			},
-			expErr:    true,
-			expErrMsg: "base proposer reward should be positive",
+			expErr:    false,
+			expErrMsg: "base proposer rewards should not be taken into account",
 		},
 		{
 			name: "bonus proposer reward > 1",
 			input: types.Params{
 				CommunityTax:        communityTax,
-				BaseProposerReward:  baseProposerReward,
-				BonusProposerReward: sdk.NewDecWithPrec(2, 0),
+				BaseProposerReward:  sdk.NewDecWithPrec(1, 2),
+				BonusProposerReward: sdk.ZeroDec(),
 				WithdrawAddrEnabled: withdrawAddrEnabled,
 			},
-			expErr:    true,
-			expErrMsg: "sum of base, bonus proposer rewards, and community tax cannot be greater than one",
-		},
-		{
-			name: "negative bonus proposer reward",
-			input: types.Params{
-				CommunityTax:        communityTax,
-				BaseProposerReward:  baseProposerReward,
-				BonusProposerReward: sdk.NewDecWithPrec(-2, 0),
-				WithdrawAddrEnabled: withdrawAddrEnabled,
-			},
-			expErr:    true,
-			expErrMsg: "bonus proposer reward should be positive",
+			expErr:    false,
+			expErrMsg: "bonus proposer rewards should not be taken into account",
 		},
 		{
 			name: "all good",
 			input: types.Params{
 				CommunityTax:        communityTax,
-				BaseProposerReward:  baseProposerReward,
-				BonusProposerReward: bonusProposerReward,
+				BaseProposerReward:  sdk.ZeroDec(),
+				BonusProposerReward: sdk.ZeroDec(),
 				WithdrawAddrEnabled: withdrawAddrEnabled,
 			},
 			expErr: false,
diff --git a/x/distribution/migrations/v3/json.go b/x/distribution/migrations/v3/json.go
new file mode 100644
index 000000000000..21f5f1f45245
--- /dev/null
+++ b/x/distribution/migrations/v3/json.go
@@ -0,0 +1,18 @@
+package v3
+
+import (
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	"github.com/cosmos/cosmos-sdk/x/distribution/types"
+)
+
+// MigrateJSON accepts exported v2 (v0.46) x/distribution genesis state and migrates it to
+// v3 (v0.47) x/distribution genesis state. The migration includes:
+//
+// Reset of the deprecated rewards to zero.
+func MigrateJSON(oldState *types.GenesisState) *types.GenesisState {
+	// reset deprecated rewards to zero
+	oldState.Params.BaseProposerReward = sdk.ZeroDec()
+	oldState.Params.BonusProposerReward = sdk.ZeroDec()
+
+	return oldState
+}
diff --git a/x/distribution/migrations/v3/json_test.go b/x/distribution/migrations/v3/json_test.go
new file mode 100644
index 000000000000..41b969330b2f
--- /dev/null
+++ b/x/distribution/migrations/v3/json_test.go
@@ -0,0 +1,64 @@
+package v3_test
+
+import (
+	"encoding/json"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/cosmos/cosmos-sdk/client"
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	moduletestutil "github.com/cosmos/cosmos-sdk/types/module/testutil"
+	"github.com/cosmos/cosmos-sdk/x/distribution"
+	v3 "github.com/cosmos/cosmos-sdk/x/distribution/migrations/v3"
+	"github.com/cosmos/cosmos-sdk/x/distribution/types"
+)
+
+func TestMigrateJSON(t *testing.T) {
+	encodingConfig := moduletestutil.MakeTestEncodingConfig(distribution.AppModuleBasic{})
+	clientCtx := client.Context{}.
+		WithInterfaceRegistry(encodingConfig.InterfaceRegistry).
+		WithTxConfig(encodingConfig.TxConfig).
+		WithCodec(encodingConfig.Codec)
+
+	distrGenState := types.DefaultGenesisState()
+
+	oldDistrState := distrGenState
+	oldDistrState.Params.BaseProposerReward = sdk.NewDecWithPrec(1, 2)
+	oldDistrState.Params.BonusProposerReward = sdk.NewDecWithPrec(4, 2)
+
+	migrated := v3.MigrateJSON(oldDistrState)
+	require.Equal(t, migrated, distrGenState)
+
+	bz, err := clientCtx.Codec.MarshalJSON(migrated)
+	require.NoError(t, err)
+
+	// Indent the JSON bz correctly.
+	var jsonObj map[string]interface{}
+	err = json.Unmarshal(bz, &jsonObj)
+	require.NoError(t, err)
+	indentedBz, err := json.MarshalIndent(jsonObj, "", "\t")
+	require.NoError(t, err)
+
+	expected := `{
+	"delegator_starting_infos": [],
+	"delegator_withdraw_infos": [],
+	"fee_pool": {
+		"community_pool": []
+	},
+	"outstanding_rewards": [],
+	"params": {
+		"base_proposer_reward": "0.000000000000000000",
+		"bonus_proposer_reward": "0.000000000000000000",
+		"community_tax": "0.020000000000000000",
+		"withdraw_addr_enabled": true
+	},
+	"previous_proposer": "",
+	"validator_accumulated_commissions": [],
+	"validator_current_rewards": [],
+	"validator_historical_rewards": [],
+	"validator_slash_events": []
+}`
+
+	require.Equal(t, expected, string(indentedBz))
+}
diff --git a/x/distribution/migrations/v3/migrate.go b/x/distribution/migrations/v3/migrate.go
index d5e2f4086a07..9fd682b29980 100644
--- a/x/distribution/migrations/v3/migrate.go
+++ b/x/distribution/migrations/v3/migrate.go
@@ -23,6 +23,10 @@ func MigrateStore(ctx sdk.Context, storeKey storetypes.StoreKey, legacySubspace
 	var currParams types.Params
 	legacySubspace.GetParamSet(ctx, &currParams)
 
+	// reset unused params
+	currParams.BaseProposerReward = sdk.ZeroDec()
+	currParams.BonusProposerReward = sdk.ZeroDec()
+
 	if err := currParams.ValidateBasic(); err != nil {
 		return err
 	}
diff --git a/x/distribution/simulation/genesis.go b/x/distribution/simulation/genesis.go
index ddda98a939ce..5607f133beb4 100644
--- a/x/distribution/simulation/genesis.go
+++ b/x/distribution/simulation/genesis.go
@@ -13,10 +13,8 @@ import (
 
 // Simulation parameter constants
 const (
-	CommunityTax        = "community_tax"
-	BaseProposerReward  = "base_proposer_reward"
-	BonusProposerReward = "bonus_proposer_reward"
-	WithdrawEnabled     = "withdraw_enabled"
+	CommunityTax    = "community_tax"
+	WithdrawEnabled = "withdraw_enabled"
 )
 
 // GenCommunityTax randomized CommunityTax
@@ -24,16 +22,6 @@ func GenCommunityTax(r *rand.Rand) math.LegacyDec {
 	return sdk.NewDecWithPrec(1, 2).Add(sdk.NewDecWithPrec(int64(r.Intn(30)), 2))
 }
 
-// GenBaseProposerReward randomized BaseProposerReward
-func GenBaseProposerReward(r *rand.Rand) math.LegacyDec {
-	return sdk.NewDecWithPrec(1, 2).Add(sdk.NewDecWithPrec(int64(r.Intn(30)), 2))
-}
-
-// GenBonusProposerReward randomized BonusProposerReward
-func GenBonusProposerReward(r *rand.Rand) math.LegacyDec {
-	return sdk.NewDecWithPrec(1, 2).Add(sdk.NewDecWithPrec(int64(r.Intn(30)), 2))
-}
-
 // GenWithdrawEnabled returns a randomized WithdrawEnabled parameter.
 func GenWithdrawEnabled(r *rand.Rand) bool {
 	return r.Int63n(101) <= 95 // 95% chance of withdraws being enabled
@@ -47,18 +35,6 @@ func RandomizedGenState(simState *module.SimulationState) {
 		func(r *rand.Rand) { communityTax = GenCommunityTax(r) },
 	)
 
-	var baseProposerReward sdk.Dec
-	simState.AppParams.GetOrGenerate(
-		simState.Cdc, BaseProposerReward, &baseProposerReward, simState.Rand,
-		func(r *rand.Rand) { baseProposerReward = GenBaseProposerReward(r) },
-	)
-
-	var bonusProposerReward sdk.Dec
-	simState.AppParams.GetOrGenerate(
-		simState.Cdc, BonusProposerReward, &bonusProposerReward, simState.Rand,
-		func(r *rand.Rand) { bonusProposerReward = GenBonusProposerReward(r) },
-	)
-
 	var withdrawEnabled bool
 	simState.AppParams.GetOrGenerate(
 		simState.Cdc, WithdrawEnabled, &withdrawEnabled, simState.Rand,
@@ -69,8 +45,6 @@ func RandomizedGenState(simState *module.SimulationState) {
 		FeePool: types.InitialFeePool(),
 		Params: types.Params{
 			CommunityTax:        communityTax,
-			BaseProposerReward:  baseProposerReward,
-			BonusProposerReward: bonusProposerReward,
 			WithdrawAddrEnabled: withdrawEnabled,
 		},
 	}
diff --git a/x/distribution/simulation/genesis_test.go b/x/distribution/simulation/genesis_test.go
index 259f0512d7a0..14d4a067807f 100644
--- a/x/distribution/simulation/genesis_test.go
+++ b/x/distribution/simulation/genesis_test.go
@@ -40,13 +40,11 @@ func TestRandomizedGenState(t *testing.T) {
 	var distrGenesis types.GenesisState
 	simState.Cdc.MustUnmarshalJSON(simState.GenState[types.ModuleName], &distrGenesis)
 
-	dec1, _ := sdk.NewDecFromStr("0.170000000000000000")
-	dec2, _ := sdk.NewDecFromStr("0.010000000000000000")
-	dec3, _ := sdk.NewDecFromStr("0.210000000000000000")
+	dec1, _ := sdk.NewDecFromStr("0.210000000000000000")
 
-	require.Equal(t, dec1, distrGenesis.Params.BaseProposerReward)
-	require.Equal(t, dec2, distrGenesis.Params.BonusProposerReward)
-	require.Equal(t, dec3, distrGenesis.Params.CommunityTax)
+	require.Equal(t, sdk.ZeroDec(), distrGenesis.Params.BaseProposerReward)  //nolint:staticcheck
+	require.Equal(t, sdk.ZeroDec(), distrGenesis.Params.BonusProposerReward) //nolint:staticcheck
+	require.Equal(t, dec1, distrGenesis.Params.CommunityTax)
 	require.Equal(t, true, distrGenesis.Params.WithdrawAddrEnabled)
 	require.Len(t, distrGenesis.DelegatorStartingInfos, 0)
 	require.Len(t, distrGenesis.DelegatorWithdrawInfos, 0)
diff --git a/x/distribution/types/distribution.pb.go b/x/distribution/types/distribution.pb.go
index c345762d3a58..044d1cd06d96 100644
--- a/x/distribution/types/distribution.pb.go
+++ b/x/distribution/types/distribution.pb.go
@@ -30,9 +30,11 @@ const _ = proto.GoGoProtoPackageIsVersion3 // please upgrade the proto package
 // Params defines the set of params for the distribution module.
 type Params struct {
 	CommunityTax github_com_cosmos_cosmos_sdk_types.Dec `protobuf:"bytes,1,opt,name=community_tax,json=communityTax,proto3,customtype=github.com/cosmos/cosmos-sdk/types.Dec" json:"community_tax"`
-	// The base_proposer_reward and bonus_proposer_reward fields are deprecated
-	// and are no longer used in the x/distribution module's reward mechanism.
-	BaseProposerReward  github_com_cosmos_cosmos_sdk_types.Dec `protobuf:"bytes,2,opt,name=base_proposer_reward,json=baseProposerReward,proto3,customtype=github.com/cosmos/cosmos-sdk/types.Dec" json:"base_proposer_reward"`    // Deprecated: Do not use.
+	// Deprecated: The base_proposer_reward field is deprecated and is no longer used
+	// in the x/distribution module's reward mechanism.
+	BaseProposerReward github_com_cosmos_cosmos_sdk_types.Dec `protobuf:"bytes,2,opt,name=base_proposer_reward,json=baseProposerReward,proto3,customtype=github.com/cosmos/cosmos-sdk/types.Dec" json:"base_proposer_reward"` // Deprecated: Do not use.
+	// Deprecated: The bonus_proposer_reward field is deprecated and is no longer used
+	// in the x/distribution module's reward mechanism.
 	BonusProposerReward github_com_cosmos_cosmos_sdk_types.Dec `protobuf:"bytes,3,opt,name=bonus_proposer_reward,json=bonusProposerReward,proto3,customtype=github.com/cosmos/cosmos-sdk/types.Dec" json:"bonus_proposer_reward"` // Deprecated: Do not use.
 	WithdrawAddrEnabled bool                                   `protobuf:"varint,4,opt,name=withdraw_addr_enabled,json=withdrawAddrEnabled,proto3" json:"withdraw_addr_enabled,omitempty"`
 }
diff --git a/x/distribution/types/msg.go b/x/distribution/types/msg.go
index 1e9e8f416e52..e13d1bdc506e 100644
--- a/x/distribution/types/msg.go
+++ b/x/distribution/types/msg.go
@@ -1,6 +1,8 @@
 package types
 
 import (
+	"errors"
+
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
 )
@@ -184,6 +186,11 @@ func (msg MsgUpdateParams) GetSignBytes() []byte {
 
 // ValidateBasic performs basic MsgUpdateParams message validation.
 func (msg MsgUpdateParams) ValidateBasic() error {
+	if (!msg.Params.BaseProposerReward.IsNil() && !msg.Params.BaseProposerReward.IsZero()) ||
+		(!msg.Params.BonusProposerReward.IsNil() && !msg.Params.BonusProposerReward.IsZero()) {
+		return errors.New("base and bonus proposer reward are deprecated fields and should not be used")
+	}
+
 	if _, err := sdk.AccAddressFromBech32(msg.Authority); err != nil {
 		return sdkerrors.ErrInvalidAddress.Wrapf("invalid authority address: %s", err)
 	}
diff --git a/x/distribution/types/params.go b/x/distribution/types/params.go
index ea3739ea3725..6d13892dccee 100644
--- a/x/distribution/types/params.go
+++ b/x/distribution/types/params.go
@@ -12,8 +12,8 @@ import (
 func DefaultParams() Params {
 	return Params{
 		CommunityTax:        sdk.NewDecWithPrec(2, 2), // 2%
-		BaseProposerReward:  sdk.NewDecWithPrec(1, 2), // 1%
-		BonusProposerReward: sdk.NewDecWithPrec(4, 2), // 4%
+		BaseProposerReward:  sdk.ZeroDec(),            // deprecated
+		BonusProposerReward: sdk.ZeroDec(),            // deprecated
 		WithdrawAddrEnabled: true,
 	}
 }
@@ -25,21 +25,6 @@ func (p Params) ValidateBasic() error {
 			"community tax should be non-negative and less than one: %s", p.CommunityTax,
 		)
 	}
-	if p.BaseProposerReward.IsNegative() {
-		return fmt.Errorf(
-			"base proposer reward should be positive: %s", p.BaseProposerReward,
-		)
-	}
-	if p.BonusProposerReward.IsNegative() {
-		return fmt.Errorf(
-			"bonus proposer reward should be positive: %s", p.BonusProposerReward,
-		)
-	}
-	if v := p.BaseProposerReward.Add(p.BonusProposerReward).Add(p.CommunityTax); v.GT(math.LegacyOneDec()) {
-		return fmt.Errorf(
-			"sum of base, bonus proposer rewards, and community tax cannot be greater than one: %s", v,
-		)
-	}
 
 	return nil
 }
@@ -63,44 +48,6 @@ func validateCommunityTax(i interface{}) error {
 	return nil
 }
 
-func validateBaseProposerReward(i interface{}) error {
-	v, ok := i.(sdk.Dec)
-	if !ok {
-		return fmt.Errorf("invalid parameter type: %T", i)
-	}
-
-	if v.IsNil() {
-		return fmt.Errorf("base proposer reward must be not nil")
-	}
-	if v.IsNegative() {
-		return fmt.Errorf("base proposer reward must be positive: %s", v)
-	}
-	if v.GT(math.LegacyOneDec()) {
-		return fmt.Errorf("base proposer reward too large: %s", v)
-	}
-
-	return nil
-}
-
-func validateBonusProposerReward(i interface{}) error {
-	v, ok := i.(sdk.Dec)
-	if !ok {
-		return fmt.Errorf("invalid parameter type: %T", i)
-	}
-
-	if v.IsNil() {
-		return fmt.Errorf("bonus proposer reward must be not nil")
-	}
-	if v.IsNegative() {
-		return fmt.Errorf("bonus proposer reward must be positive: %s", v)
-	}
-	if v.GT(math.LegacyOneDec()) {
-		return fmt.Errorf("bonus proposer reward too large: %s", v)
-	}
-
-	return nil
-}
-
 func validateWithdrawAddrEnabled(i interface{}) error {
 	_, ok := i.(bool)
 	if !ok {
diff --git a/x/distribution/types/params_internal_test.go b/x/distribution/types/params_internal_test.go
index 55d846eaad1d..2ea34f965e10 100644
--- a/x/distribution/types/params_internal_test.go
+++ b/x/distribution/types/params_internal_test.go
@@ -28,8 +28,6 @@ func Test_validateAuxFuncs(t *testing.T) {
 		tt := tt
 		t.Run(tt.name, func(t *testing.T) {
 			require.Equal(t, tt.wantErr, validateCommunityTax(tt.args.i) != nil)
-			require.Equal(t, tt.wantErr, validateBaseProposerReward(tt.args.i) != nil)
-			require.Equal(t, tt.wantErr, validateBonusProposerReward(tt.args.i) != nil)
 		})
 	}
 }
diff --git a/x/distribution/types/params_legacy.go b/x/distribution/types/params_legacy.go
index f82901383df1..26ebfc8b5d0e 100644
--- a/x/distribution/types/params_legacy.go
+++ b/x/distribution/types/params_legacy.go
@@ -5,8 +5,6 @@ import paramtypes "github.com/cosmos/cosmos-sdk/x/params/types"
 // Parameter keys
 var (
 	ParamStoreKeyCommunityTax        = []byte("communitytax")
-	ParamStoreKeyBaseProposerReward  = []byte("baseproposerreward")
-	ParamStoreKeyBonusProposerReward = []byte("bonusproposerreward")
 	ParamStoreKeyWithdrawAddrEnabled = []byte("withdrawaddrenabled")
 )
 
@@ -19,8 +17,6 @@ func ParamKeyTable() paramtypes.KeyTable {
 func (p *Params) ParamSetPairs() paramtypes.ParamSetPairs {
 	return paramtypes.ParamSetPairs{
 		paramtypes.NewParamSetPair(ParamStoreKeyCommunityTax, &p.CommunityTax, validateCommunityTax),
-		paramtypes.NewParamSetPair(ParamStoreKeyBaseProposerReward, &p.BaseProposerReward, validateBaseProposerReward),
-		paramtypes.NewParamSetPair(ParamStoreKeyBonusProposerReward, &p.BonusProposerReward, validateBonusProposerReward),
 		paramtypes.NewParamSetPair(ParamStoreKeyWithdrawAddrEnabled, &p.WithdrawAddrEnabled, validateWithdrawAddrEnabled),
 	}
 }
diff --git a/x/distribution/types/params_test.go b/x/distribution/types/params_test.go
index d156df728d65..e58e8e2065dc 100644
--- a/x/distribution/types/params_test.go
+++ b/x/distribution/types/params_test.go
@@ -23,18 +23,17 @@ func TestParams_ValidateBasic(t *testing.T) {
 		fields  fields
 		wantErr bool
 	}{
-		{"success", fields{toDec("0.1"), toDec("0.5"), toDec("0.4"), false}, false},
-		{"negative community tax", fields{toDec("-0.1"), toDec("0.5"), toDec("0.4"), false}, true},
-		{"negative base proposer reward", fields{toDec("0.1"), toDec("-0.5"), toDec("0.4"), false}, true},
-		{"negative bonus proposer reward", fields{toDec("0.1"), toDec("0.5"), toDec("-0.4"), false}, true},
-		{"total sum greater than 1", fields{toDec("0.2"), toDec("0.5"), toDec("0.4"), false}, true},
+		{"success", fields{toDec("0.1"), toDec("0"), toDec("0"), false}, false},
+		{"negative community tax", fields{toDec("-0.1"), toDec("0"), toDec("0"), false}, true},
+		{"negative base proposer reward (must not matter)", fields{toDec("0.1"), toDec("0"), toDec("-0.1"), false}, false},
+		{"negative bonus proposer reward (must not matter)", fields{toDec("0.1"), toDec("0"), toDec("-0.1"), false}, false},
+		{"total sum greater than 1 (must not matter)", fields{toDec("0.2"), toDec("0.5"), toDec("0.4"), false}, false},
+		{"community tax greater than 1", fields{toDec("1.1"), toDec("0"), toDec("0"), false}, true},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			p := types.Params{
 				CommunityTax:        tt.fields.CommunityTax,
-				BaseProposerReward:  tt.fields.BaseProposerReward,
-				BonusProposerReward: tt.fields.BonusProposerReward,
 				WithdrawAddrEnabled: tt.fields.WithdrawAddrEnabled,
 			}
 			if err := p.ValidateBasic(); (err != nil) != tt.wantErr {
diff --git a/x/genutil/migrations/v047/migrate.go b/x/genutil/migrations/v047/migrate.go
index 8bfdff608a93..0e3512257aae 100644
--- a/x/genutil/migrations/v047/migrate.go
+++ b/x/genutil/migrations/v047/migrate.go
@@ -6,6 +6,9 @@ import (
 	authtypes "github.com/cosmos/cosmos-sdk/x/auth/types"
 	bankv4 "github.com/cosmos/cosmos-sdk/x/bank/migrations/v4"
 	banktypes "github.com/cosmos/cosmos-sdk/x/bank/types"
+	v1distr "github.com/cosmos/cosmos-sdk/x/distribution/migrations/v1"
+	v3distr "github.com/cosmos/cosmos-sdk/x/distribution/migrations/v3"
+	distrtypes "github.com/cosmos/cosmos-sdk/x/distribution/types"
 	"github.com/cosmos/cosmos-sdk/x/genutil/types"
 	v4gov "github.com/cosmos/cosmos-sdk/x/gov/migrations/v4"
 	govv1 "github.com/cosmos/cosmos-sdk/x/gov/types/v1"
@@ -47,5 +50,13 @@ func Migrate(appState types.AppMap, clientCtx client.Context) types.AppMap {
 		appState[v1auth.ModuleName] = clientCtx.Codec.MustMarshalJSON(newAuthState)
 	}
 
+	// Migrate x/distribution params (reset unused)
+	if oldDistState, ok := appState[v1distr.ModuleName]; ok {
+		var old distrtypes.GenesisState
+		clientCtx.Codec.MustUnmarshalJSON(oldDistState, &old)
+		newDistState := v3distr.MigrateJSON(&old)
+		appState[v1distr.ModuleName] = clientCtx.Codec.MustMarshalJSON(newDistState)
+	}
+
 	return appState
 }