As a separate thought, do you have another instance of XO (or XOA) running somewhere which may have been configured with the xo-config file?

Question for @florent

@olivierlambert If you want me to check anything else, just tell me and I will test for you. Many Thanks BR Marco

Exactly what @nick-lloyd said, it is important to backup XO configuration AND the pool metadata as well to be able to recovery completely.