: Keys are tied to the firmware version. Newer games often require updated keys from more recent firmware (like version 19.x or 20.x) to be decrypted and launched.
Are you setting this up for a like Ryujinx or Sudachi? switch prod keys 14.1.2
If you need prod.keys for firmware 14.1.2, you must have access to a Nintendo Switch that is: : Keys are tied to the firmware version