Used Steam Code

HI, I received an email for the Halo Infinite multiplayer invite, when I checked the message section in halo waypoint they gave me a steam code. I went to my linked Steam account with Halo Waypoint to activate the code, and it said the code was already used by another account. Is there a possibility that this can be an error from Halo or if they are sending the same codes to more people?

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: