Chose wrong character when registering on PS4 (I think)

[Delis]

Do you mean you had a separate service account for the old character or is it old character on same account just different server, because you can change the server listing to get to a character that is on a different server. To do that, on the character select screen, above the character list should be a button labled World. If you click that it will bring up a list of the worlds on that Data Center. It will also tell you the number of characters you have on the world next to the world name so you can tell if you have a character on a different world.