How to remove null fields?

I am looking at my products in studio and I see a few “null” fields.
(see attachment)

How do I delete/remove those?

(Yes, I have done multiple quick repair & rebuild).

Hi Gilles,

This sometimes happens when adding/removing custom fields. You will need to remove the field from:

custom/Extension/modules/yourmodule/Ext/Vardefs

Then run a Quick Repair & Rebuild.

Thanks,

Will.