diff --git a/src/views/planetDesign/Design/fragement/QuestionStem.vue b/src/views/planetDesign/Design/fragement/QuestionStem.vue
index 31e34152..624897f7 100644
--- a/src/views/planetDesign/Design/fragement/QuestionStem.vue
+++ b/src/views/planetDesign/Design/fragement/QuestionStem.vue
@@ -427,7 +427,12 @@ export default {
      * 复制题目
      */
     const copyHandle = (copyInfo) => {
-      context.emit('update', copyInfo)
+      // 2024-09-30 remove this line.
+      // this line (1st api call) and the end line of this method (2nd api call) will trigger api call twice (same api with different params)
+      // and the sequence of those two api call is very important
+      // sometimes (not very often) 1st api call would be after 2nd api call [[[the ERROR show up here]]]
+      // backend will add and delete new copied question immediately
+      // context.emit('update', copyInfo)
       let copyInfoCopy = JSON.parse(JSON.stringify(copyInfo))
       if ([105, 201].includes(copyInfoCopy.question_type)) {
         copyInfoCopy.config.design_version = 0