fix obj None check

contracts/admin.py

@@ -571,14 +571,13 @@ class ContractAdmin(
             fields += fieldset[1]["fields"]
 
         if (
-            obj.created_by == request.user
+            obj is not None
+            and obj.created_by == request.user
             and obj.status == obj.StatusTypes.TO_BE_APPROVED
             and not request.user.has_perm("contracts.edit_when_approved")
         ):
             fields.remove("status")
 
-            print("returning", fields)
-
             return fields
 
         return list(self.readonly_fields)