That clerk also probably cost the store its license to sell lottery.
I can tell you that the lottery must pay out, if it cannot prove that you didn’t steal it. However, you had better know when and where it was purchased and to show if you paid credit, debit, or cash. Those are the questions you will be asked if you try to redeem for anything requiring redemption at the lottery office.
Otherwise, it could be an investigation for up to six weeks while they check out cameras and everything.