- You updated your emuNAND to a version which is not supported by the Gateway (or clone) and want to go back to an old version. But you don't have a backup.
=> Update your 3DS NAND by using a game card, create a backup of the 3DS NAND, flash your 4.X NAND backup back to the 3DS and inject the updated NAND backup to the emuNAND SD.(ATTENTION: make sure you have a valid 4.X NAND backup and are able to flash it back with hardware!)