From e479ee3337721321e376723f6d0e63f697bfa1f8 Mon Sep 17 00:00:00 2001
From: yanghongwei <hongwei7458@163.com>
Date: Sat, 20 Sep 2025 16:29:21 +0800
Subject: [PATCH] =?UTF-8?q?bug=E8=B0=83=E6=95=B4?=
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---
 Service/AlarmService.cs | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/Service/AlarmService.cs b/Service/AlarmService.cs
index 00d36e8..b624c21 100644
--- a/Service/AlarmService.cs
+++ b/Service/AlarmService.cs
@@ -56,7 +56,13 @@ namespace LY.App.Service
                 entity = entity.Where(s => checkDistance(s.drone_lat, s.drone_lon, deviceinfo.Lat, deviceinfo.Lon) == true).ToList();
                 if (O4entity.Any())
                 {
-                    entity.AddRange(O4entity);
+                    foreach (var item in O4entity)
+                    {
+                        if (!entity.Exists(s => s.serial_number == item.serial_number))
+                        {
+                            entity.Add(item);
+                        }
+                    }
                 }
                 if (entity.Any())
                 {