Windows 7 Upgrade, Is my Vista still valid?

I’ve upgraded my laptop to Windows 7 using a Windows 7 Upgrade DVD. I did a fresh install. However I noticed that on the back of my DVD it had a separate Key for Windows 7 which I activated it with. Does this mean that my old Vista key is still valid as Windows 7 had a separate Key or will it have been blocked?

I’ve never upgraded Windows before just got a new PC lol