To give context, I’m now in a pretty bad situation.
I need to urgently migrate my discourse installation from the current server to a new server, as the current server will be shut down in a few days.
The current server is in 2.9.0.beta7. I can start a new server in 2.8.6, but I cannot apply a backup from the current server into the new server, as it’s a downgrade. And I’m incapable of starting a new empty server on 2.9.0.beta7, as it just gives the above error.
My data folder in the current server is big enough I don’t have space in disk enough to compact it and copy it somewhere; even if I did, I assume there would be consequences on using data from a more recent beta into an older version. I also tried to ‘downgrade’ the current server, just in case, but I know it’s unsupported and it didn’t work anyway.