I'm upgrading an existing RAC database from 10.2.0.3 to 18.104.22.168 on new hardware. I have issue where I am trying to add the new database to EM 12c and its giving me an error that the individual rac names are already registered. Yes they are. On different hosts. I have a unquie name defined the cluster and that works fine. Its just when it goes to add the individual targets... they fails with name already exists.