Unregister vSphere Replication from vCenter Server if the Appliance Was Deleted

If you delete the vSphere Replication appliance before unregistering it from the environment, you cannot use the virtual appliance management interface (VAMI) to unregister vSphere Replication from vCenter Server

Before you deploy a new vSphere Replication Appliance, you must clean up your environment by using the Managed Object Browser (MOB).