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()