diff --git a/server/queues/tasks/CommentUpdatedNotificationsTask.ts b/server/queues/tasks/CommentUpdatedNotificationsTask.ts
index 91239c1b8..09a3fed45 100644
--- a/server/queues/tasks/CommentUpdatedNotificationsTask.ts
+++ b/server/queues/tasks/CommentUpdatedNotificationsTask.ts
@@ -6,7 +6,7 @@ import BaseTask, { TaskPriority } from "./BaseTask";
 
 export default class CommentUpdatedNotificationsTask extends BaseTask<CommentEvent> {
   public async perform(event: CommentUpdateEvent) {
-    const newMentionIds = event.data.newMentionIds;
+    const newMentionIds = event.data?.newMentionIds;
     if (!newMentionIds) {
       return;
     }
diff --git a/server/types.ts b/server/types.ts
index 9b77db86e..bdecbc31c 100644
--- a/server/types.ts
+++ b/server/types.ts
@@ -341,8 +341,8 @@ export type CommentUpdateEvent = BaseEvent<Comment> & {
   modelId: string;
   documentId: string;
   actorId: string;
-  data: {
-    newMentionIds?: string[];
+  data?: {
+    newMentionIds: string[];
   };
 };