Just to be clear, is this for a Catalog Item?

yes

Michael Fry1
Kilo Patron

You should use an Assignment rule. All that script is doing is setting an assignment group variable, not the assignment group on the record.

원본 게시물의 솔루션 보기

How to achieve/check this ?

This is what assignment rules are for. Assuming the assignment group is blank, a rule like this will run. It will not run if the assignment group has a value.

find_real_file.png

find_real_file.png