Your “authorization” - just like anyone else’s with Cubase 6 is on the USB Key, and therefore all you have to do is stick the key into your new machine.
That´s about a soft-elicenser, Cubase 6 uses a USB e-licenser (also called “Hardware licenser” as in your screenshot), and therefore does not need to be reactivated.
To tell you that a soft e-licenser has been deactivated, because it no longer the same computer it was originally installed on. I don´t have any info on your computer and software, so I don´t know why you had a soft e-licenser activated. It is however not because of Cubase 6.
As always: Download and install the latest e-licenser software.
Should you indeed hav software that requires an soft e-licenser → The re-activation procedure is explained in mySteinberg and the knowledge base. And if nothing else helps, do as the message says and contact your software vendor´s support.