diff --git a/pkg/core/resources/registry/registry.go b/pkg/core/resources/registry/registry.go
index ef895ff4948d..95308ecd216c 100644
--- a/pkg/core/resources/registry/registry.go
+++ b/pkg/core/resources/registry/registry.go
@@ -26,16 +26,16 @@ func NewTypeRegistry() TypeRegistry {
 	}
 }
 
-type InvalidResourceType struct {
+type InvalidResourceTypeError struct {
 	ResType model.ResourceType
 }
 
-func (e *InvalidResourceType) Error() string {
+func (e *InvalidResourceTypeError) Error() string {
 	return fmt.Sprintf("invalid resource type %q", e.ResType)
 }
 
-func (e *InvalidResourceType) Is(target error) bool {
-	t, ok := target.(*InvalidResourceType)
+func (e *InvalidResourceTypeError) Is(target error) bool {
+	t, ok := target.(*InvalidResourceTypeError)
 	if !ok {
 		return false
 	}
@@ -49,7 +49,7 @@ type typeRegistry struct {
 func (t *typeRegistry) DescriptorFor(resType model.ResourceType) (model.ResourceTypeDescriptor, error) {
 	typDesc, ok := t.descriptors[resType]
 	if !ok {
-		return model.ResourceTypeDescriptor{}, &InvalidResourceType{ResType: resType}
+		return model.ResourceTypeDescriptor{}, &InvalidResourceTypeError{ResType: resType}
 	}
 	return typDesc, nil
 }
diff --git a/pkg/core/rest/errors/error_handler.go b/pkg/core/rest/errors/error_handler.go
index 60adbab414d7..18312ace52e3 100644
--- a/pkg/core/rest/errors/error_handler.go
+++ b/pkg/core/rest/errors/error_handler.go
@@ -32,7 +32,7 @@ func HandleError(ctx context.Context, response *restful.Response, err error, tit
 			Title:  title,
 			Detail: "Not found",
 		}
-	case errors.Is(err, &rest.InvalidResourceError{}) || errors.Is(err, &registry.InvalidResourceType{}) || errors.Is(err, &store.PreconditionError{}):
+	case errors.Is(err, &rest.InvalidResourceError{}) || errors.Is(err, &registry.InvalidResourceTypeError{}) || errors.Is(err, &store.PreconditionError{}):
 		kumaErr = &types.Error{
 			Status: 400,
 			Title:  "Bad Request",
diff --git a/pkg/kds/server/status_sink.go b/pkg/kds/server/status_sink.go
index 2932e4dcb75b..866b8b4e15c9 100644
--- a/pkg/kds/server/status_sink.go
+++ b/pkg/kds/server/status_sink.go
@@ -2,9 +2,11 @@ package server
 
 import (
 	"context"
+	"errors"
 	"time"
 
 	"github.com/go-logr/logr"
+	"google.golang.org/protobuf/proto"
 
 	system_proto "github.com/kumahq/kuma/api/system/v1alpha1"
 	config_store "github.com/kumahq/kuma/pkg/config/core/resources/store"
@@ -15,7 +17,6 @@ import (
 	"github.com/kumahq/kuma/pkg/core/user"
 	kuma_log "github.com/kumahq/kuma/pkg/log"
 	"github.com/kumahq/kuma/pkg/multitenant"
-	"google.golang.org/protobuf/proto"
 )
 
 type ZoneInsightSink interface {
@@ -85,7 +86,7 @@ func (s *zoneInsightSink) Start(ctx context.Context, stop <-chan struct{}) {
 		}
 
 		if err := s.store.Upsert(gracefulCtx, zone, currentState); err != nil {
-			if store.IsResourceConflict(err) || store.IsResourceAlreadyExists(err) {
+			if errors.Is(err, &store.ResourceConflictError{}) {
 				log.V(1).Info("failed to flush ZoneInsight because it was updated in other place. Will retry in the next tick", "zone", zone)
 			} else {
 				log.Error(err, "failed to flush zone status", "zone", zone)