Promote Avamar REPLICA as Primary

Hi all,

I have AV-DD backup environment M600 and DD2500. We want to replace it with AVE and newer DD model; as DD2500 will be EOS soon. We will be replicating the existing backup data to this AVE - New DD (let say DD6900). But then, I just curious, how we can set/promote the REPLICA as primary backup once we completed the replication and want to terminate the old M600 and DD2500?