How to make PA segment as mandatory for FB60 and FB70

Dear COPA experts,

I would like to make PA segment to be mandatory in FB60 and FB70 screens. I did the following configuration:

Field status group for GL master - PA segment made it mandatory. Posting key field status controls for posting key 40 and 50 made mandatory.

For FB01, I see that PA segment becomes mandatory for all COPA GL accounts.

But for FB60 and FB70, although I am using the same posting key 40 and 50 for the income and expense line, the PA segment is still showing as optional and not mandatory.

Can you please help me understand what am I missing here?

Any help would highly be appreciated

Best Regards

Surya