diff --git a/src/ReC.Application/Common/Procedures/InsertProcedure/InsertResultProcedure.cs b/src/ReC.Application/Common/Procedures/InsertProcedure/InsertResultProcedure.cs
index 66c73ec..b95e7a4 100644
--- a/src/ReC.Application/Common/Procedures/InsertProcedure/InsertResultProcedure.cs
+++ b/src/ReC.Application/Common/Procedures/InsertProcedure/InsertResultProcedure.cs
@@ -7,12 +7,12 @@ public record InsertResultProcedure : IInsertProcedure
     public string? Header { get; set; }
     public string? Body { get; set; }
 
-    public InsertObjectProcedure ToObjectProcedure(string addedWho = "Rec.API")
+    public InsertObjectProcedure ToObjectProcedure(string? addedWho = null)
     {
         return new InsertObjectProcedure
         {
             Entity = "RESULT",
             Result = this
-        }.AddedBy(addedWho);
+        }.AddedBy(addedWho ?? "Rec.API");
     }
 }
\ No newline at end of file