Problem:

I cannot establish the Volume Replication to the new server. I always get this error:
 
Task type: Volume replication. Task name: Repl00.Status:
                   Error 28: Logical volume on mirror server is already configured to replicate with another logical volume on remote node.

Solution: 

Remove volume replication metadata.
In DSS section:  Configuration -> Volume manager -> Volume groups -> vgxxx   select from the Action menu: change lvxxxx and un-check the volume replication on ALL volumes.

Add the volume replication option to ALL volumes again.