Nephews father passed away, and he just recently got the PS4 back from his fathers partner. He can’t sign into the PS4 PSN as we don’t know his fathers gmail password (Can get it eventually off google after a fair amount of hoop jumping.)

He doesn’t want to delete his fathers account and all of their data that they played together, so we created a new account for him on my phone. We signed up and signed in, and it worked for a second, but then no longer. It asks to sign in and throws up his fathers email address. When we change it to the new one we created and password and we try to login, we get the above error every time. We have also tried with passkey. Is there any easier way to do this?

TIA.