Got a new download code, still says its a dupe.

Title says it all, got a new email with a new code, put it in, still says its a duplicate.

Same here. Weird, I wonder whats going on because it worked fine last flight

There was an issue with duplicate/invalid Steam keys earlier, resulting in codes having to be re-generated and published a few times. 343 have resolved this issue now and distributed new and working codes to everyone affected. If for any reason your new code still does not work, please file a support ticket on the Insider Support Site.

You can check for your new Steam key in one of these three places: