Are you asking if you can delete your Beta from your console? If so, then the answer is yes. There is no practical reason to have it- it is not required for the Beta emblems or anything, so feel free.
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Cheers for the reply.. I have the alpha as well, just thought I'd check before I purged incase I missed out on anything
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Alpha has no use either, so don't worry.
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Lol I'm keeping both as keepsakes until the game launches lol