I’m still using the old API key because when I tried migrating, purchases made with the old key weren’t recognized by the new API (I opened an issue here: https://github.com/RevenueCat/purchases-flutter/issues/472).

Today I tried migrating again and noticed the issue still persists. Subscriptions made with the old API key are recognized by the new API, but one-time purchases still aren’t.

If the user taps the “Restore Purchases” button, it does correctly recognize it — but I feel like that’s unnecessary friction for the user, and it could lead to negative feedback for the app.

I’m also getting the lint warning that Purchases.setup (Flutter) is deprecated. So I just want to know: can I still keep using the old API key? And will support for it eventually be dropped?

As a side note, when I restore the purchase made with the old API key, I get this message on console, and then the purchase is fully restored:
 

🤖‼️ Couldn't acknowledge purchase after restoring it, this most likely means the subscription has expired already or the product has already been acknowledged.
W/ Purchases] - WARN(16026): ⚠️ Unable to start a network connection due to a network configuration issue: https://api.revenuecat.com/v1/receipts
D/ePurchases] - DEBUG(16026): API request started: POST /receipts
D/sPurchases] - DEBUG(16026): API request completed with status: POST /receipts 400
E/tPurchases] - ERROR(16026): 😿‼️ PurchasesError(code=UnknownBackendError, underlyingErrorMessage=Backend Code: 7651 - The payment for this non-subscription product is not complete., message='There was an unknown backend error.')
D/aPurchases] - DEBUG(16026): 💰 Not consuming in-app purchase according to server configuration. This is expected for non-consumable products. The user won't be able to purchase this product again.
D/ePurchases] - DEBUG(16026): 💰 Acknowledging purchase with token badkbmipdehdfnclebclcjpf.AO-J1Owp8f5cvBztQwOGJdi20ifz_Euz1znlTUP5Qi79Q2bSnUsCEIjww1fqLMob31i-P0PJ3uR2Qfs-tcEk3Fdy5htnhsl6pfmFVZXbhJ0fAgPkalOjyULNn1bddcsEn_MV_egxiR4k
E/hPurchases] - ERROR(16026): 😿‼️ Error restoring purchase: StoreTransaction(orderId=null, productIds=uga_basic_lifetime], type=INAPP, purchaseTime=1746651569660, purchaseToken=badkbmipdehdfnclebclcjpf.AO-J1Owp8f5cvBztQwOGJdi20ifz_Euz1znlTUP5Qi79Q2bSnUsCEIjww1fqLMob31i-P0PJ3uR2Qfs-tcEk3Fdy5htnhsl6pfmFVZXbhJ0fAgPkalOjyULNn1bddcsEn_MV_egxiR4k, purchaseState=UNSPECIFIED_STATE, isAutoRenewing=null, signature=TANbWl2fAoW0npNJj1QMMq8cloOGhmkeDaDFA8q5gWf8VhUPQcJ0OfedoIoHLR8Y7BGMMyKeYfvJDCQoOvVEW9Ip1sCjjlbz1DdZ2WJNdMVwbztRT8h01nHoPLiVFYgEi8rhxHLvRwjLBpS7x956Fk6NGRwvB5tfvKaHadubb0eLfDb6zW1UWIIRLHqT9lBYVa6PtzfZVE5tkacpJAcaOJRsj1A/yzO+X0Ux0lIQmsMTixTHkPiK6S2l1hAUFG4SuO+4poxPrQh1xdcAHXicPvt9/KN9MpnBIc5rCUURB3nFy9UmQoxuihJ45llXgswEIZV3MfquLvcoJri2zSaYAA==, originalJson={"productId":"ga_basic_lifetime","purchaseToken":"badkbmipdehdfnclebclcjpf.AO-J1Owp8f5cvBztQwOGJdi20ifz_Euz1znlTUP5Qi79Q2bSnUsCEIjww1fqLMob31i-P0PJ3uR2Qfs-tcEk3Fdy5htnhsl6pfmFVZXbhJ0fAgPkalOjyULNn1bddcsEn_MV_egxiR4k","purchaseTime":1746651569660,"quantity":1,"developerPayload":null}, presentedOfferingContext=null, storeUserID=null, purchaseType=GOOGLE_RESTORED_PURCHASE, marketplace=null, subscriptionOptionId=null, replacementMode=null). Error: PurchasesError(code=UnknownBackendError, underlyingErrorMessage=Backend Code: 7651 - The payment for this non-subscription product is not complete., message='There was an unknown backend error.')