diff --git a/src/lib/services/conversation-service.js b/src/lib/services/conversation-service.js
index 46521901..dabcd5d4 100644
--- a/src/lib/services/conversation-service.js
+++ b/src/lib/services/conversation-service.js
@@ -185,7 +185,7 @@ export async function sendNotification(conversationId, text, data = null) {
  * @param {string} conversationId The conversation id
  * @param {string} messageId The target message id to delete
  * @param {boolean} isNewMessage If sending a new message while deleting a message
- * @returns {Promise<string>}
+ * @returns {Promise<any>}
  */
 export async function deleteConversationMessage(conversationId, messageId, isNewMessage = false) {
     let url = replaceUrl(endpoints.conversationMessageDeletionUrl, {
diff --git a/src/routes/chat/[agentId]/[conversationId]/chat-box.svelte b/src/routes/chat/[agentId]/[conversationId]/chat-box.svelte
index 8736e4df..3de15830 100644
--- a/src/routes/chat/[agentId]/[conversationId]/chat-box.svelte
+++ b/src/routes/chat/[agentId]/[conversationId]/chat-box.svelte
@@ -1114,8 +1114,8 @@
 		}).then(async (result) => {
 			if (result.value) {
 				const postback = buildPostback(message?.message_id);
-				deleteConversationMessage(params.conversationId, message?.message_id, true).then(resMessageId => {
-					sendChatMessage(message?.text, { postback: postback, inputMessageId: resMessageId });
+				deleteConversationMessage(params.conversationId, message?.message_id, true).then(res => {
+					sendChatMessage(message?.text, { postback: postback, inputMessageId: res?.messageId });
 				});
 			}
 		});