diff --git a/pkg/detector/detector.go b/pkg/detector/detector.go
index 362bcbc5c..8c3fee708 100644
--- a/pkg/detector/detector.go
+++ b/pkg/detector/detector.go
@@ -980,16 +980,6 @@ func (d *ResourceDetector) ReconcilePropagationPolicy(key util.QueueKey) error {
 		return nil
 	}
 
-	// TODO(whitewindmills): In order to adapt to the upgrade scenario, we temporarily add finalizer here.
-	// Transplant it to karmada-webhook in the next release. More info: https://github.com/karmada-io/karmada/pull/4836#discussion_r1568186728.
-	if controllerutil.AddFinalizer(propagationObject, util.PropagationPolicyControllerFinalizer) {
-		if err = d.Client.Update(context.TODO(), propagationObject); err != nil {
-			klog.Errorf("Failed to add finalizer for PropagationPolicy(%s), err: %v", ckey.NamespaceKey(), err)
-			return err
-		}
-		return nil
-	}
-
 	klog.Infof("PropagationPolicy(%s) has been added or updated.", ckey.NamespaceKey())
 	return d.HandlePropagationPolicyCreationOrUpdate(propagationObject)
 }
@@ -1092,16 +1082,6 @@ func (d *ResourceDetector) ReconcileClusterPropagationPolicy(key util.QueueKey)
 		return nil
 	}
 
-	// TODO(whitewindmills): In order to adapt to the upgrade scenario, we temporarily add finalizer here.
-	// Transplant it to karmada-webhook in the next release. More info: https://github.com/karmada-io/karmada/pull/4836#discussion_r1568186728.
-	if controllerutil.AddFinalizer(propagationObject, util.ClusterPropagationPolicyControllerFinalizer) {
-		if err = d.Client.Update(context.TODO(), propagationObject); err != nil {
-			klog.Errorf("Failed to add finalizer for ClusterPropagationPolicy(%s), err: %v", ckey.NamespaceKey(), err)
-			return err
-		}
-		return nil
-	}
-
 	klog.Infof("ClusterPropagationPolicy(%s) has been added or updated.", ckey.NamespaceKey())
 	return d.HandleClusterPropagationPolicyCreationOrUpdate(propagationObject)
 }
diff --git a/pkg/webhook/clusterpropagationpolicy/mutating.go b/pkg/webhook/clusterpropagationpolicy/mutating.go
index dc7141eef..cf76ba4c7 100644
--- a/pkg/webhook/clusterpropagationpolicy/mutating.go
+++ b/pkg/webhook/clusterpropagationpolicy/mutating.go
@@ -24,6 +24,7 @@ import (
 
 	"github.com/google/uuid"
 	admissionv1 "k8s.io/api/admission/v1"
+	"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
 	"sigs.k8s.io/controller-runtime/pkg/webhook/admission"
 
 	policyv1alpha1 "github.com/karmada-io/karmada/pkg/apis/policy/v1alpha1"
@@ -85,6 +86,7 @@ func (a *MutatingAdmission) Handle(_ context.Context, req admission.Request) adm
 
 	if req.Operation == admissionv1.Create {
 		util.MergeLabel(policy, policyv1alpha1.ClusterPropagationPolicyPermanentIDLabel, uuid.New().String())
+		controllerutil.AddFinalizer(policy, util.ClusterPropagationPolicyControllerFinalizer)
 	}
 
 	marshaledBytes, err := json.Marshal(policy)
diff --git a/pkg/webhook/propagationpolicy/mutating.go b/pkg/webhook/propagationpolicy/mutating.go
index 01aa95185..298fba279 100644
--- a/pkg/webhook/propagationpolicy/mutating.go
+++ b/pkg/webhook/propagationpolicy/mutating.go
@@ -25,6 +25,7 @@ import (
 	"github.com/google/uuid"
 	admissionv1 "k8s.io/api/admission/v1"
 	"k8s.io/klog/v2"
+	"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
 	"sigs.k8s.io/controller-runtime/pkg/webhook/admission"
 
 	policyv1alpha1 "github.com/karmada-io/karmada/pkg/apis/policy/v1alpha1"
@@ -97,6 +98,7 @@ func (a *MutatingAdmission) Handle(_ context.Context, req admission.Request) adm
 
 	if req.Operation == admissionv1.Create {
 		util.MergeLabel(policy, policyv1alpha1.PropagationPolicyPermanentIDLabel, uuid.New().String())
+		controllerutil.AddFinalizer(policy, util.PropagationPolicyControllerFinalizer)
 	}
 
 	marshaledBytes, err := json.Marshal(policy)