From 3b5b3fe143349b7440c99bd78a07cb8590d856ce Mon Sep 17 00:00:00 2001
From: Vladyslav_Prykhodko <vprykhodko@thingsboard.io>
Date: Fri, 25 Jul 2025 10:54:40 +0300
Subject: [PATCH] UI: Fix error message in Alarm widget preview when opening
 Assign field dropdown

---
 .../widget/lib/alarm/alarms-table-widget.component.ts        | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/ui-ngx/src/app/modules/home/components/widget/lib/alarm/alarms-table-widget.component.ts b/ui-ngx/src/app/modules/home/components/widget/lib/alarm/alarms-table-widget.component.ts
index b1c0f38ef2..3972ceecb0 100644
--- a/ui-ngx/src/app/modules/home/components/widget/lib/alarm/alarms-table-widget.component.ts
+++ b/ui-ngx/src/app/modules/home/components/widget/lib/alarm/alarms-table-widget.component.ts
@@ -1187,8 +1187,9 @@ export class AlarmsTableWidgetComponent extends PageComponent implements OnInit,
   }
 
   openAlarmAssigneePanel($event: Event, entity: AlarmInfo) {
-    if ($event) {
-      $event.stopPropagation();
+    $event?.stopPropagation();
+    if (entity.id.id === NULL_UUID) {
+      return
     }
     const target = $event.target || $event.currentTarget;
     const config = new OverlayConfig();