Stuck Attribute labeled

How to delete this stuck attribute?

This profession has relationship on the membership collection. That picture is from membership collection. Step why this stuck occured.

1. I have data in profession collection cant deleted, it says that Server Error.
2. Since this data cant delete I decided to delete the profession collection.
3. Then I recreated the profession collection with the same ID of my older profession collection.
4. Now I click the membership collection to delete the relationship with old profession to connect it again to the new profession. Then the stuck occurs