How to make an attribute invisible when the Enum in a Delta Config is Empty ?

Hi All,

I am using a project area (Father) that shares its process template with many other projects areas ( Sons).
In the father I did create a new Enumeration List that is empty, values will be set up in the Sons using the dela config, but not all the sons, some of them. I did also create a new attribute that points on the Enumeration List.

When the delta config is not set in a son the attribute does appear and this is what I would like to avoid ?
Is there any way to hide the attribute as the values are not set in the delta config of the Son ?

Thanks for your help.

Regards.

Karl