Activating and deactivating Steinberg Licensing licenses

Hi again everyone, I had a windows pc with Cubase 11 working perfectly with the usb dongle for years. I decide to buy Cubase 12 so I can also run it on my Mac at home. I haven’t installed 12 yet, but now at my studio, still running 11, I’m getting “No licence found. Please switch to activation manager” when I try to run Halion Sonic SE or Groove Agent Se 3. Activation Manager does nothing for me. It just shows Cubase 12 not activated. I wasn’t going to install 12 on this computer yet. Help?