diff --git a/pkg/addon/addon_suite_test.go b/pkg/addon/addon_suite_test.go
index b996ca051..60a293b9b 100644
--- a/pkg/addon/addon_suite_test.go
+++ b/pkg/addon/addon_suite_test.go
@@ -418,9 +418,12 @@ var _ = Describe("test override defs of addon", func() {
 		u := unstructured.Unstructured{Object: compUnstructured}
 		u.SetAPIVersion(v1beta1.SchemeGroupVersion.String())
 		u.SetKind(v1beta1.ComponentDefinitionKind)
+		u.SetLabels(map[string]string{"testUpdateLabel": "test"})
 		c, err := checkConflictDefs(ctx, k8sClient, []*unstructured.Unstructured{&u}, app.GetName())
 		Expect(err).Should(BeNil())
 		Expect(len(c)).Should(BeEquivalentTo(1))
+		// guarantee checkConflictDefs won't change source definition
+		Expect(u.GetLabels()["testUpdateLabel"]).Should(BeEquivalentTo("test"))
 
 		u.SetName("rollout")
 		c, err = checkConflictDefs(ctx, k8sClient, []*unstructured.Unstructured{&u}, app.GetName())
diff --git a/pkg/addon/utils.go b/pkg/addon/utils.go
index a8a5ca330..9dea2dd89 100644
--- a/pkg/addon/utils.go
+++ b/pkg/addon/utils.go
@@ -448,20 +448,21 @@ func isErrorCueRenderPathNotFound(err error, path string) bool {
 func checkConflictDefs(ctx context.Context, k8sClient client.Client, defs []*unstructured.Unstructured, appName string) (map[string]string, error) {
 	res := map[string]string{}
 	for _, def := range defs {
-		err := k8sClient.Get(ctx, client.ObjectKeyFromObject(def), def)
+		checkDef := def.DeepCopy()
+		err := k8sClient.Get(ctx, client.ObjectKeyFromObject(checkDef), checkDef)
 		if err == nil {
-			owner := metav1.GetControllerOf(def)
+			owner := metav1.GetControllerOf(checkDef)
 			if owner == nil || owner.Kind != v1beta1.ApplicationKind {
-				res[def.GetName()] = fmt.Sprintf("definition: %s already exist and not belong to any addon \n", def.GetName())
+				res[checkDef.GetName()] = fmt.Sprintf("definition: %s already exist and not belong to any addon \n", checkDef.GetName())
 				continue
 			}
 			if owner.Name != appName {
 				// if addon not belong to an addon or addon name is another one, we should put them in result
-				res[def.GetName()] = fmt.Sprintf("definition: %s in this addon already exist in %s \n", def.GetName(), addon.AppName2Addon(appName))
+				res[checkDef.GetName()] = fmt.Sprintf("definition: %s in this addon already exist in %s \n", checkDef.GetName(), addon.AppName2Addon(appName))
 			}
 		}
 		if err != nil && !errors2.IsNotFound(err) {
-			return nil, errors.Wrapf(err, "check definition %s", def.GetName())
+			return nil, errors.Wrapf(err, "check definition %s", checkDef.GetName())
 		}
 	}
 	return res, nil