Eventually I can destroy and recreate this "export" volume again with the old names (ovirt0N.localdomain.local) if you give me the sequence of commands, then enable debug and retry the reset-brick command
Gianluca
So it seems I was able to destroy and re-create.
Now I see that the volume creation uses by default the new ip, so I reverted the hostnames roles in the commands after putting glusterd in debug mode on the host where I execute the reset-brick command (do I have to set debug for the the nodes too?)