Symantec Enterprise HELP

[NickFRP]

Got a Symantec Antivirus Server running 9.0. built a new machine and put 10.2 on it. now on the consol to manage both it says that i need to make the new server the primary in order to have clients be managed by it. Now what happens when i make it a primary, what happens to the 9.0 (the primay one at the moment) as the whole office are running from that one

How can i keep it as a priamy but get to set put Symantec on new machines running 10.2 being managed by the enw server

Thanks
Nick