A prod.keys file from 2021 will work for games released up to that specific firmware version (roughly version 12.x or 13.x).
This happens because newer games are encrypted using introduced in later firmware versions. A 2021 key file simply does not contain the newer mathematical formulas required to unlock modern games. How to Check if Your Keys are Correct sak are the keysdat prodkeys correct 2021
Ensure you are using the most current prod.keys from your Switch. If you are unable to dump them yourself, you must ensure you are using keys that match the firmware of the game you are trying to unpack. For mid-2021, were standard. By late 2021, 13.0.0+ keys were required for newer games. 2. Correctly Place and Rename Files Open your SAK folder . Go to the SAK_64bit -> bin folder. Place your prod.keys file inside the bin folder. A prod