diff --git a/ButcherFactory.Form/SegmentProductionAuto_/SegmentProductionAutoForm.cs b/ButcherFactory.Form/SegmentProductionAuto_/SegmentProductionAutoForm.cs
index 80d4879..d1aa98e 100644
--- a/ButcherFactory.Form/SegmentProductionAuto_/SegmentProductionAutoForm.cs
+++ b/ButcherFactory.Form/SegmentProductionAuto_/SegmentProductionAutoForm.cs
@@ -596,6 +596,8 @@ namespace ButcherFactory.SegmentProductionAuto_
                       if (_codePanel != null && _totalCode.ID == item2.Key)
                       {
                           flowLayoutPanel4.Controls.Clear();
+                          _codePanel = null;
+                          _totalCode = null;
                       }
                   }