As the titel says I got a question concerning the premium upgrade.

My premium upgrade runs for another 40 days or so and I was wondering when to purchase another one (I usually use ebs for that). I noticed in the upgrade history, that there's a note whether the upgrade is active or not.

So my question is: can I like tomorrow purchase another upgrade and have it inactive until my current upgrade runs out?

Or if not what does the note in the upgrade history mean with an upgrade being active or not?

Any help would be much appreciated

Active next to the upgrade means that it's currently in use. When the current one runs out, the one that you (say you do buy one tomorrow) get tomorrow would become active.