diff --git a/src/views/trials/trials-panel/setting/reading-unit/components/QuestionsForm.vue b/src/views/trials/trials-panel/setting/reading-unit/components/QuestionsForm.vue
index a889039f..bda77edd 100644
--- a/src/views/trials/trials-panel/setting/reading-unit/components/QuestionsForm.vue
+++ b/src/views/trials/trials-panel/setting/reading-unit/components/QuestionsForm.vue
@@ -776,7 +776,7 @@ export default {
         MaxQuestionCount: null,
         IsCopyLesions: false,
         MaxAnswerLength: null,
-        AddDeleteTypeEnum: null,
+        AddDeleteTypeEnum: 0,
         FileType: [],
         DictionaryCode: null,
         GroupId: null,