PANIC: could not locate a valid checkpoint record
i think your db’s corrupt. imo it would be best to restore from a backup. i think discourse may make backups by default? look in discourse/shared/app/backups or whatever.
if you don’t have a discourse backup, then this becomes more of a postgres support topic than a discourse one. i could try to help i guess, but i’m not an expert.
you might have to use this: