Restore backup documentation is not correct
Minor - inconvenience | misleading | easy workaround
Operational - other Techniques | Technique editor | Rudder settings
In the backup documentation : https://www.rudder-project.org/doc-4.1/_migration_backups_and_restores.html
There are commands to backup and restore the postgresql content.
However, the command before is "service rudder stop" which stops postgres.