I managed to create a bit of a situation. I took a current backup to prepare to change my server’s hostname. Unfortunately, that change failed as I didn’t point the new hostname at the box beforehand. No matter.
I tried restoring that backup and it didn’t work. So I tried changing my hostname back to what it was and rebooting. Unfortunately I made a huge error - I had put the backup in /tmp temporarily and didn’t copy it to persistent storage. Facepalm.
Luckily I have a full foreman-maintain/katello backup from 2020-08-27. Great, right? So I tried restoring that with foreman-maintain and it appeared to work, but basically EVERYTHING in Foreman is now blank. I had to reset the admin password to get in and everything is just hosed.
The backup was taken from a 3.16.RC4 installation.