diff --git a/CompanyManagment.EFCore/Repository/PersonnelCodeRepository.cs b/CompanyManagment.EFCore/Repository/PersonnelCodeRepository.cs
index 48adbbe5..57e27cdc 100644
--- a/CompanyManagment.EFCore/Repository/PersonnelCodeRepository.cs
+++ b/CompanyManagment.EFCore/Repository/PersonnelCodeRepository.cs
@@ -94,7 +94,14 @@ public class PersonnelCodeRepository : RepositoryBase<long, PersonnelCodeDomain>
     #region Mahan
     public long GetLastPersonnelCodeByWorkshop(long workshopId)
     {
-        return _context.PersonnelCodeSet.Where(x => x.WorkshopId == workshopId).Max(x => x.PersonnelCode);
+        var codes = _context.PersonnelCodeSet.Where(x => x.WorkshopId == workshopId);
+
+        if (!codes.Any())
+        {
+            return 0;  // مقدار پیش‌فرض یا هندل خاص تو این حالت
+        }
+
+        return codes.Max(x => x.PersonnelCode);
     }
 
     #endregion