bug repro

examples/resources/namespace/namespace.tf

@@ -6,5 +6,5 @@ resource "temporalcloud_namespace" "terraform" {
   name               = "terraform"
   regions            = ["aws-us-east-1"]
   accepted_client_ca = base64encode(file("${path.module}/ca.pem"))
-  retention_days     = 14
+  retention_days     = 7
 }

internal/provider/namespace_resource.go

@@ -136,6 +136,9 @@ func (r *namespaceResource) Schema(ctx context.Context, _ resource.SchemaRequest
 			},
 			"resource_version": schema.StringAttribute{
 				Computed: true,
+				PlanModifiers: []planmodifier.String{
+					stringplanmodifier.UseStateForUnknown(),
+				},
 			},
 			"certificate_filters": schema.ListNestedAttribute{
 				Optional: true,
@@ -263,6 +266,10 @@ func (r *namespaceResource) Update(ctx context.Context, req resource.UpdateReque
 	if resp.Diagnostics.HasError() {
 		return
 	}
+
+	tflog.Debug(ctx, "running update with resource version", map[string]any{
+		"resource_version": plan.ResourceVersion.ValueString(),
+	})
 	svcResp, err := r.client.UpdateNamespace(ctx, &cloudservicev1.UpdateNamespaceRequest{
 		Namespace: plan.ID.ValueString(),
 		Spec: &namespacev1.NamespaceSpec{

internal/provider/namespace_resource_test.go

@@ -45,12 +45,10 @@ PEM
 				// New namespace with retention of 7
 				Config: config("tf-basic-namespace", 7),
 			},
-			/* Does not work yet: CLD-1971
 			{
 				// Update retention to 14
-				Config: testAccBasicNamespaceConfig("terraform-test", 14),
+				Config: config("terraform-test", 14),
 			},
-			*/
 			// Delete testing automatically occurs in TestCase
 		},
 	})