I bought two licenses of Cortex Command years ago and had given one of my two keys to a friend as a gift. I just now tried to register my license on Steam. I got a key, and went to register it, but it said it had already been used. Finding something very suspicious about this, I found my friend's key, which I had kept record of in case he forgot it. I put it in, and it gave me the exact same Steam key that my license did.

What can I do about this?

Get your new register code here http://licensing.datarealms.com/licensing/