diff --git a/hwe/ts/components/MessagePanel.vue b/hwe/ts/components/MessagePanel.vue
index b3d9fcd6..0dfa4af8 100644
--- a/hwe/ts/components/MessagePanel.vue
+++ b/hwe/ts/components/MessagePanel.vue
@@ -187,6 +187,19 @@ const messageIndexedList: Record<MsgType, Ref<MsgItem[]>> = {
   diplomacy: messageDiplomacy,
 };
 
+function processMsg(msg: MsgItem) {
+  if (msg.option.delete) {
+    (() => {
+      const targetID = msg.option.delete;
+      const targetMsg = messageStorage.get(targetID);
+      if(!targetMsg){
+        return;
+      }
+      targetMsg.option.invalid = true;
+    })();
+  }
+}
+
 function updateMsgResponse(response: MsgResponse) {
   if (!response.keepRecent) {
     messageStorage.clear();
@@ -230,6 +243,7 @@ function updateMsgResponse(response: MsgResponse) {
       if (oldMsg !== undefined) {
         continue;
       }
+      processMsg(msg);
       messageStorage.set(msg.id, msg);
       filteredMsgList.push(msg);
     }
@@ -461,7 +475,7 @@ function foldMessage($event: MouseEvent, type: MsgType) {
   const remain = target.slice(10);
   target.length = 10;
 
-  for(const msg of remain){
+  for (const msg of remain) {
     messageStorage.delete(msg.id);
   }
 }
@@ -574,7 +588,7 @@ onMounted(async () => {
     border-right: 1px solid gray;
   }
 
-  .only-mobile{
+  .only-mobile {
     display: none;
   }
 }
@@ -602,7 +616,5 @@ onMounted(async () => {
   .d-grid.Actions {
     grid-template-columns: 1fr 1fr;
   }
-
-
 }
 </style>
diff --git a/hwe/ts/components/MessagePlate.vue b/hwe/ts/components/MessagePlate.vue
index e881ce5d..9fa9e16f 100644
--- a/hwe/ts/components/MessagePlate.vue
+++ b/hwe/ts/components/MessagePlate.vue
@@ -67,7 +67,7 @@
         <button
           type="button"
           class="prompt_yes btn_prompt"
-          :disabled="allowButton ? true : undefined"
+          :disabled="allowButton ? undefined : true"
           @click="tryAccept"
         >
           수락
@@ -75,7 +75,7 @@
         <button
           type="button"
           class="prompt_no btn_prompt"
-          :disabled="allowButton ? true : undefined"
+          :disabled="allowButton ? undefined : true"
           @click="tryDecline"
         >
           거절