'Plant' field now requires input - why is that?

Hello all,

Here is my issue:

when inputing Vendor Invoice (transaction FB60), the system now requires an entry in the 'Plant' field.

I am using a regular P&L account which is also a regular cost element

the context is that some changes are brought in our system - related to other parts of the company.

a few weeks ago OBYC was apparently changed - I do not know if this is related to the issue above.

What do you think could have brought the change in the settging and what do you suggest I do to fix?

I thought the Plant was only for Logistic

Thanks a lot for your time and patience

KR - Loï