Migrating two different Macs on one, but with separate users
I bought a Mac mini M1 and want to migrate my data as well as my wife's. We have been using two very old MacBook Pro's and we each created a Time Machine backup in order to restore an account on the new Mac mini. When I migrate my account everything works fine. We created a new user with admin priviledges for her. As my wife started migrating her's, it wants to override the hard drive and delete my already migrated user and data. How can we solve this dilemma?
Thanks for any help!
Mac mini, macOS 11.6