after last week rehost, we activated PA for Windchill also for our Test server.
I can confirm that GUID sent is the same for both Dev and Test.
Have you already opened a case for this issue?
We are in the process of working on a fix for this issue which will come in the form of a command line utility allowing you to designate a new GUID for your rehosted system. Please check back on this thread early next week for updates on availability.
Yes, this was discovered as part of a case I have open. Walid's comment about a command line solution is new. I was told by tech support that a fix would come in a future critical patch set and to configure any cloned or rehosted systems to not send performance advisor data until this is fixed.