Forum Post: Failure adding field to existing tab

I am trying to add a field to an existing tab in my change request window. I provide a Field Name, Display Name, Type = Enumerated, and three possible values: 100 = No 200 = Yes 300 = space character   Default value is set to Yes. When I try to apply the changes I receive the following error:   "Parent enum code does not exist on property"   Can anyone provide a clue as to what this error is trying to tell me, or what might be causing this specific error?   Any help would be greatly appreciated.   Thanks,