EAM Administration - changing Owners ??

So we configured EAM,

created lots of FF ID's across our wide Production Landscape

assigned all of these to EAM Owners

And then assigned the FF id's to EAM users, where we again have to assign the same Owner !!!!!

Ofcourse the original Owner moved on and someone new replaces her.

However, I cannot just remove/replace the assignment of Owner - FF-ID

Instead I get the following error message:

There are hundreds of FF_ID -> EAM user accounts assignments done with her as owner. Do I have to change each and every individual assignment when one person has a new job? Or does someone know about some mass update functionality?

Kind regards,

Frank van Naamen