diff --git a/src/components/Discover/Conformance/MoreModal.vue b/src/components/Discover/Conformance/MoreModal.vue
index 7774c71..e345326 100644
--- a/src/components/Discover/Conformance/MoreModal.vue
+++ b/src/components/Discover/Conformance/MoreModal.vue
@@ -58,6 +58,7 @@
 import { storeToRefs } from 'pinia';
 import ConformanceStore from '@/stores/conformance.js';
 import cytoscapeMapTrace from '@/module/cytoscapeMapTrace.js';
+import { nextTick } from 'vue';
 
 export default {
   props: ['issusModal', 'issusNo', 'traceId', 'firstCases'],
@@ -129,7 +130,7 @@ export default {
     },
     showTraceId: function(newValue, oldValue) {
       let isScrollTop = document.querySelector('.infiniteTable');
-      if(typeof isScrollTop.scrollTop !== 'undefined') if(newValue !== oldValue) isScrollTop.scrollTop = 0;
+      if(isScrollTop && typeof isScrollTop.scrollTop !== 'undefined') if(newValue !== oldValue) isScrollTop.scrollTop = 0;
     },
     firstCases: function(newValue, oldValue){
       this.infiniteData = newValue;