This is a new one for me. For years, I have purchased a 12-month gift card from Sam's Club and used it to re-up my Spotify account. Spotify says my next bill will be on 7/8, so that is when my current gift card is exhausted. When I first tried to apply this gift card, Spotify told me no because it will not allow me to have more than 18 months of prepaid service. Now it tells me no for this reason, and I do not know what to do:

"You can't apply this Premium code to your account. This is likely because you have an existing Premium subscription that cannot be combined with a Premium code."

My gift card will expire 7/24. Has Spotify changed redemption rules to make it worthless?