MySQL 9.4 Release Notes
        
      The STOP REPLICA statement can be
      used to stop a multi-source replica. By default, if you use the
      STOP REPLICA statement on a
      multi-source replica all channels are stopped. Optionally, use the
      FOR CHANNEL 
      clause to stop only a specific channel.
channel
- To stop all currently configured replication channels: - mysql> STOP REPLICA;
- To stop only a named channel, use a - FOR CHANNELclause:- channel- mysql> STOP REPLICA FOR CHANNEL "source_1";
      For the full syntax of the STOP
      REPLICA statement and other available options, see
      Section 15.4.2.5, “STOP REPLICA Statement”.