From 057a8505891eac41d8c97d32fb5f3c4e27d4012f Mon Sep 17 00:00:00 2001
From: Pavel Kunyavskiy <kunyavskiy@gmail.com>
Date: Fri, 27 Oct 2023 12:52:45 +0200
Subject: [PATCH] Fix widget leak

---
 src/backend/src/main/kotlin/org/icpclive/data/Manager.kt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/backend/src/main/kotlin/org/icpclive/data/Manager.kt b/src/backend/src/main/kotlin/org/icpclive/data/Manager.kt
index 1e3e43e3e..c3d0d7cb9 100644
--- a/src/backend/src/main/kotlin/org/icpclive/data/Manager.kt
+++ b/src/backend/src/main/kotlin/org/icpclive/data/Manager.kt
@@ -26,6 +26,7 @@ abstract class ManagerWithEvents<in T : TypeWithId, E> : Manager<T>() {
     protected abstract fun createSnapshotEvent(items: List<T>): E
 
     override suspend fun add(item: T) = mutex.withLock {
+        items.removeIf { it.id == item.id } // We don't need the remove event, as create considered as the set on frontend.
         items.add(item)
         sendEvent(createAddEvent(item))
     }