diff --git a/Myshipping.Application/Service/BookingOrder/BookingOrderService.cs b/Myshipping.Application/Service/BookingOrder/BookingOrderService.cs
index 6cab8446..b279f722 100644
--- a/Myshipping.Application/Service/BookingOrder/BookingOrderService.cs
+++ b/Myshipping.Application/Service/BookingOrder/BookingOrderService.cs
@@ -994,7 +994,7 @@ namespace Myshipping.Application
                     {
                         var ctnentity = item.Adapt<BookingCtn>();
                         //封账处理
-                        var oldctn = ctnlist.Where(x => x.CNTRNO == item.CNTRNO).First();
+                        var oldctn = ctnlist.Where(x => x.CNTRNO == item.CNTRNO).FirstOrDefault();
                         if (oldctn != null)
                         {
                             var isextendctn = await GetIsBookingLockCtn(ctnentity, oldctn);