From f1806ae4f3ab2b6d8c134145edecd9ee854c8f62 Mon Sep 17 00:00:00 2001
From: hardstylewyl <827778732@qq.com>
Date: Wed, 23 Apr 2025 14:52:32 +0800
Subject: [PATCH] =?UTF-8?q?fix=EF=BC=9A=E4=BF=AE=E5=A4=8Dtracks=E4=B8=BA?=
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---
 .../CAP/EventHandlers/TrackUpsertEventHandler.cs              | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/SJZY.Track.Application/CAP/EventHandlers/TrackUpsertEventHandler.cs b/src/SJZY.Track.Application/CAP/EventHandlers/TrackUpsertEventHandler.cs
index 87e48e6f..e1f0402b 100644
--- a/src/SJZY.Track.Application/CAP/EventHandlers/TrackUpsertEventHandler.cs
+++ b/src/SJZY.Track.Application/CAP/EventHandlers/TrackUpsertEventHandler.cs
@@ -296,8 +296,8 @@ public class TrackUpsertEventHandler : ITransientDependency, ICapSubscribe
             var timezone = Math.Abs(@event.TrackTimeZone - GlobalConst.NoneTrackTimeZone) < 0.01f ? 8.0f : @event.TrackTimeZone;
 
             // todo-remove:为了照顾FBA老逻辑，暂时特殊处理一下
-            var trackFirst = tracks.First();
-            if (trackFirst.SubSystemId == 9517)
+            var trackFirst = tracks.FirstOrDefault();
+            if (trackFirst?.SubSystemId == 9517)
             {
                 existTracks = @event.IsAdd
                     ? tracks.Where(x => x.TrackTime == (@event.NewTrackTime ?? @event.TrackTime)).ToList()