This is why it does not work anymore. System title(s) without legit ticket. "
I also broke several applications with the same method." And because they broke when using this method you thought it would be a good idea to try it on a vital component?! Did you even successfully install the file? For me FBI fails with:
Failed to install CIA file
Result code: 0xC8E083FC
Level: Status (25)
Summary: Invalid argument (7)
Module AM (32)
Desc: Already exists (1020)
(Seems the Home Menu
.app file is write protected – unlike the legit ticket. FBI can't remove or overwrite the app file.)
After this the damage is already done – legit ticket is replaced by fake and it even seems Home Menu is gone from the title list.
I also got black screen on reboot and ARM11 exception when holding power:
Exception type: prefetch abort (kernel panic)
Fault status: Debug event
Current process: ptm (0004013000002202)
I'm not really sure what is the least destructive method here. CTRTransfer or NAND restore. The full restore will revert the title database to an earlier state. Titles installed after that will not be useable. Rebuilding the title database might be needed.
Simply reinstalling a CIA file will overwrite the save of the game.
I would try CTRTransfer first. Simple CTRTransfer with GodMode9 from my own ctrnand_full.bin repaired the damage.
Please remember to backup the current (bricked) status.