Replacing invalid id with default id.

I just added a new hard drive to my computer and installed windows 7 onto it, but on my other hard drive I have windows xp and I still have this one in the computer. I have set my computer to boot windows 7 but just before it does it says "replacing invalid id with default id" and it repeats this going up numbers for ages. When it first happened I left it for about an hour and it reached 400,000 but then I restarted my pc. I know how to get around it but I just don't know how to stop it from appearing every time I go on.

Any advice on how to stop it would be much appreciated. Thank you.