I have my ps4 set up in my living room and just bought my friends ps3 for my kids room so she can watch ps vue. I tried changing the psn email on the ps3 but it won't let me use my psn email. Can I use my pan on multiple devices? If so how do I do that? My friend didn't clear anything off the system so all her stuff is still on there so I don't know if that could be causing the problem.