I think the only way around it is if you have a close friend that you can trust to take control of the other server since there are linked to a steam account.
That's such bs. There shouldn't have to be a way around. It should just not be setup this way. I'm glad if other people may find this way around useful, but unfortunately I do not have anybody who owns Last Oasis + is someone I trust and is able to take control of my other server.