diff --git a/Seyounth.Hyosung.Runtime/HyosungRuntime.cs b/Seyounth.Hyosung.Runtime/HyosungRuntime.cs
index 6c54b4b..5b31baa 100644
--- a/Seyounth.Hyosung.Runtime/HyosungRuntime.cs
+++ b/Seyounth.Hyosung.Runtime/HyosungRuntime.cs
@@ -312,6 +312,8 @@ public class HyosungRuntime(
                 control = await hyosungWmsService.GetControlNo(variety, grade);
             else
                 control = control + 1;
+            if (control == 1000)
+                control = 1;
             var isEven = control % 2 == 0;
             await varietyService.SetLastNo(variety.Id, control.Value);
             await trayService.SetControlNoAsync(arg, control.Value);