I wanted to set up Google Family Library sharing between my phone and my wife's phone. I began following the setup steps on both devices and when I sent the invitations between them I got the "Can only be part of one family" error. I eventually realized that I had set up both devices as "Family Manager" so they must have both had their own separate family groups. I deleted the group on my wife's phone so she could then join mine, but it still gives the error.
I read that you could only switch family groups once a year. I hope that's not the reason it's not joining. Did I screw myself over on this or is there something I can do to get the family library share working in this situation?