diff --git a/core/core-frontend/src/custom-component/v-query/Tree.vue b/core/core-frontend/src/custom-component/v-query/Tree.vue
index b17165bb69..c2f711356a 100644
--- a/core/core-frontend/src/custom-component/v-query/Tree.vue
+++ b/core/core-frontend/src/custom-component/v-query/Tree.vue
@@ -363,7 +363,7 @@ watch(
     }
   }
 )
-const fakeValue = ''
+const fakeValue = ref()
 const treeValue = ref()
 const getCustomWidth = () => {
   if (placeholder?.value?.placeholderShow) {