diff --git a/MDM/Models/Process/Dto/ProcessOperationWorkstationMappingDto.cs b/MDM/Models/Process/Dto/ProcessOperationWorkstationMappingDto.cs
index c0c56f3..e2dda08 100644
--- a/MDM/Models/Process/Dto/ProcessOperationWorkstationMappingDto.cs
+++ b/MDM/Models/Process/Dto/ProcessOperationWorkstationMappingDto.cs
@@ -18,7 +18,7 @@ namespace MDM.Model.Process.Dto
         public string? FkWorkstationCode { get; set; }
 
 
-        public string FkProductlinebodyCode { get; set; }
+        public string? FkProductlinebodyCode { get; set; }
     }
 
     /// <summary>