I am trying to migrate my gitlab backups for my old server to new server. my old server has gitlab (gitlab-6.5.1-0) and my new server has gitlab version (gitlab 6.6.5-omnibu
According to the error message, the backup archive is created by (gitlab-6.5.1-0) and can't be restored using (gitlab 6.6.5-omnibus).
For simple solution, I'd recommend installing gitlab-6.5.1-omnibus
and restored your backup archive first. Then, do the upgrade through linux package system. Run sudo gitlab-rake db:migrate
if you encountered any problem related to databases