### Description If your try to migrate any user to internal account type it fails with the error message `Non-local users are not allowed to change their username.` Already tried to keep or change the user property values through ui: `Authentication Sign-In Name` or `Username` ### Gitea Version 1.22.2 ### Can you reproduce the bug on the Gitea demo site? No ### Log Gist _No response_ ### Screenshots See https://forum.gitea.com/t/ho-to-change-gitea-user-account-type/9682 ### Git Version _No response_ ### Operating System Ubuntu LTS ### How are you running Gitea? docker swarm stack ### Database PostgreSQL