I'm trying to allow users to apply a promo offer on their current subscription such that they get a discount on their upcoming billing cycle. However, when I try to redeem it while testing, the client produces an error, saying the user already has that subscription. This could also be because I'm testing with TestFlight, which sometimes has weird purchase-related errors. Or maybe I set-up the promo offer wrong? However, my method of making promo offers works when the promo offer is applied to a different crossgrading subscription. Based on some language in the documentation, it seemed like this was possible, however, there's also some documentation insinuating otherwise 😔: Set up promotional offers for auto-renewable subscriptions “You can use these offers to help win back subscribers who canceled their subscriptions or promote an upgrade to a higher-ranked subscription at a special price.” Implementing promotional offers in your app | Unlock the Service "When a customer redeems a promotional offer, the offer period starts at the next billing event. For upgrades or crossgrades to a different subscription with the same duration, the promotional offer triggers a billing event and goes into effect immediately. For downgrades or crossgrades to a different subscription with different durations, the promotional offer period goes into effect at the next renewal date. For the same subscription in an introductory offer, this promotional offer period goes into effect at the next scheduled billing event." Would love for any and all insight! 🙏