When activating Dashboard Server you see:
"License already activated"
"Maximum activations reached"
Activation keys are normally valid for a limited number of activations.
Your Primary Production license key can only be activated once.
If you uninstall and reinstall on the same server and you originally carried out an offline activation (as described in How to activate your license offline (manual activation))then you can reuse the same .bin file by browsing to <SquaredUpURL>/InstallLicense. The .bin file cannot be used on a different server.
For more information see How to activate your license
If you need any help please contact SquaredUp Support with the activation key.