managed fields bug fix

internal/util/ssa/managedfields.go

@@ -20,6 +20,8 @@ package ssa
 import (
 	"context"
 	"encoding/json"
+	"k8s.io/klog/v2"
+	"sigs.k8s.io/controller-runtime/pkg/client/apiutil"
 
 	"github.com/pkg/errors"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
@@ -81,10 +83,14 @@ func CleanUpManagedFieldsForSSAAdoption(ctx context.Context, obj client.Object,
 		return errors.Wrap(err, "failed to create seeding fieldV1Map for cleaning up legacy managed fields")
 	}
 	now := metav1.Now()
+	gvk, err := apiutil.GVKForObject(obj, c.Scheme())
+	if err != nil {
+		return errors.Wrapf(err, "failed to get GroupVersionKind of object %s", klog.KObj(obj))
+	}
 	managedFields = append(managedFields, metav1.ManagedFieldsEntry{
 		Manager:    ssaManager,
 		Operation:  metav1.ManagedFieldsOperationApply,
-		APIVersion: obj.GetObjectKind().GroupVersionKind().GroupVersion().String(),
+		APIVersion: gvk.GroupVersion().String(),
 		Time:       &now,
 		FieldsType: "FieldsV1",
 		FieldsV1:   &metav1.FieldsV1{Raw: fieldV1},