PS4 - Primary activate does not work. What to do?

I tried to log in to my colleague's account and activate the Primary. However, I'm notified of an error, I should disable the primary in his Ps4. My question is, is not that how it used to be activated on the 2nd PS4? What should I do if it works?

Sure, your buddy has to get rid of the primary on his PS4, then you can activate it on yours. After doing this, you can log in and gamble as normal in your account. Your buddy can also play undisturbed with his own account, with him it does not matter if his account is primary or secondary. Only on your PS, it is important that his account is set as primary