SHOW SLAVE STATUS \G shows slaves are not running and replication ended with a duplicate error on dbispconfig2. Having cleared the first duplication it comes up with another (on dbispconfig2). I don't know if there will be more. Is it safe to stop both mariadb servers, do a mysqdump of dbispconfig1 and reload to dbispconfig2? Will I need to clear the backlog before restarting? I suspect the cause was me mistakenly doing stuff on Server2 when I thought I was on Server1 because it had not replicated. UNISON is humming along nicely in the background.