The instance '****.**.**:3306' cannot be added to an InnoDB cluster because it has asynchronous (source-replica) replication channel(s) configured. MySQL InnoDB Cluster

  Error: 

  MySQL  JS > dba.checkInstanceConfiguration("root@192.*.*.*")

 NOTE: Found unexpected replication channel '' at ****.**.**:3306:3306

WARNING: The instance '****.**.**:3306' cannot be added to an InnoDB cluster because 

it has asynchronous (source-replica) replication channel(s) configured. MySQL InnoDB Cluster 

does not support manually configured channels as they are not managed using the AdminAPI (e.g. when PRIMARY moves to another member)

which may cause cause replication to break or even create split-brain scenarios (data loss).

Solution: 

         mysql> STOP REPLICA;

mysql> RESET REPLICA  ALL;

RE-execute : 

           MySQL  JS > dba.checkInstanceConfiguration("root@192.168.94.133")