diff --git a/sci-log-db/src/utils/websocket.ts b/sci-log-db/src/utils/websocket.ts
index 3371de4b..7c1cd18b 100644
--- a/sci-log-db/src/utils/websocket.ts
+++ b/sci-log-db/src/utils/websocket.ts
@@ -192,6 +192,7 @@ export async function startWebsocket(app: SciLogDbApplication) {
             const doc = await collection.findOne({
               _id: Mongo.ObjectId(change.documentKey._id),
             });
+            if (!doc) return;
             // console.log(websocketMap[id])
             if (typeof websocketMap[id] != 'undefined') {
               // eslint-disable-next-line  @typescript-eslint/no-explicit-any