repmgr primary unregister — unregister an inactive primary node
      repmgr primary unregister unregisters an inactive primary node
      from the repmgr metadata. This is typically when the primary has failed and is
      being removed from the cluster after a new primary has been promoted.
    
      repmgr primary unregister can be run on any active repmgr node,
      with the ID of the node to unregister passed as --node-id.
    
      Execute with the --dry-run option to check what would happen without
      actually unregistering the node.
    
      repmgr master unregister can be used as an alias for
      repmgr primary unregister.
    
--dry-runCheck prerequisites but don't actually unregister the primary.
--node-idID of the inactive primary to be unregistered.
--forceForcibly unregister the node if it is registered as an active primary, as long as it has no registered standbys; or if it is registered as a primary but running as a standby.
      A primary_unregister event notification will be generated.