Upgrade to v5.72.0 - Systemd process manager has not been set up or is corrupted

Developer help Self-hosting
5

So I found the migrations_lock table and updated the lock to 0 as per Migration lock after updating Ghost - #4 by KeenenCharles - but when I sudo systemctl restart ghost_jaguart-tech the MigrationsLock error recurrs, and the database has been updated to 1 again…

I also tried ghost update --rollback - which fails with permissions because the Ghost logs are owned by Ghost rather than normal user. Opened the permissions on the logs - but --rollback fails at the systemctl stop stage.

ghost update --force says it has succeeded, but systemctl start and while it thinks its running, syslog says:

{
   message: {
     statusCode: 500,
     errorType: 'InternalServerError',
     level: 'critical',
     message: "Ghost was able to start, but errored during boot with: EACCES: permission denied, open '/var/www/www.jaguart.tech/content/data/the-art-of-jagu.ghost.2023-11-06-07-08-11.json'",
     id: '3ee655f0-7c73-11ee-bf5e-7d632264e5ee',
     name: 'InternalServerError',
     code: 'EACCES',
     property: null,
     redirect: null,
     hideStack: false,
     errno: -13,
     syscall: 'open',
     path: '/var/www/www.jaguart.tech/content/data/the-art-of-jagu.ghost.2023-11-06-07-08-11.json'
   }
}

The file that is is unable to open does not exist - it has the MigrationsLock timestamp in it’s name. So at a guess, the reinstall even with --force is missing a step…

Not sure what to try next - any help appreciated.