but now it's working

client/src/utils/APIClient.js

@@ -26,11 +26,7 @@ export class APIClient extends EventEmitter {
     async deleteEvent(item) {
         const rq = await axios.post(`${this.#dbUrl}/api/deleteEvent`, item);
         if (rq.status !== 200) throw new Error(`Request failed with status code ${rq.status}: ${rq.statusText}`);
-        this.#events.splice(
-            this.#events.findIndex((e) => e._id === item.id),
-            1
-        );
-        this.emit("EVENT_CREATE", this.#events, rq.data);
+        await this.fetchEvents();
         return rq.data;
     }