They lied to you. It will work, and the coupon doesn't state such a restriction. If you haven't traded yet, I'd try a different Gamestop.I bought one and my gamestop told me you couldn't use it for next gen towards next gen
give you 3 paypalHave:
Buy 2 get 1 free preowned (expires 6/30)
$10 off preowned
Want:
$5 a piece amazon/psn/paypal