I had AIO installed and running with its data on a separate partition. However the OS did not work as I would like to, so I thought that I could just re-install the OS and after that re-install AIo and just point it to the existing data dir.
Well, stupid idea, it does not work that way.
Starting Nextcloud installation... Username is invalid because files already exist for this user Installation of Nextcloud failed!
Is there any way to install aio again and use the existing data dir? Without having to restore everything from a backup. It takes ages to get the data into nextcloud with the migration app.