You can reconfigure or break an existing site pair.
If you have problems with an existing site pair, you can attempt to reconfigure the site pair with the Reconfigure Site Pair action. When you provide the required credentials, the reconfiguration operation attempts to repair the existing site pair.
With the Break Site Pair action, you can break the pairing between the Site Recovery Manager Server and vSphere Replication instances on the protected and the recovery sites. You can select which pairing to break. For example, you can break the pairing between the two Site Recovery Manager Server instances, the two vSphere Replication appliances, or both.
You cannot use the Reconfigure Site Pair action to add a missing pairing or a pairing that was manually broken with Break Site Pair. If your site pair is missing a pairing, you must use New Site Pair to configure it.