Halo 5 Experience Video - Code already used?

So… I watched all the videos for Locke and Master Chief and as soon as I press “redeem” for the assault rifle skin, it says my code is being used? Help lol

were do i go to even watch the video Lol

Yeah, in the same boat. Definitely haven’t used it, as its not unlocked.
And when I replay, i’m given the same code again

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