How to Manage Existing SSO Users After Migrating from Version 2.58.4 to 3.1.0 with SSO Disabled?

Hey, we tried to migrate from 2.58.4 in staging to 3.1.0 but the SSO Login was disabled because it is only in the PRO Model anymore, right? But how to login with the existing SSO Users? I cant set a password for them and cant even delete them to register them. What is the best way to get them to work?