Typically to make 60fps cheats function, you need to OC or use reversenx to bring the graphics down to be able to run it.
If you have a cheat like that still active after a reboot it's probably in the games cheat directory, and you may have your cheats auto apply
Check sdmc://atmosphere/contents/01008F6008C5E000/cheats/[game build id]
If you don't see anything, the cheat could be an exefs patch. To delete those go to
Check sdmc://atmosphere/exefs/[a description of a violet 60 fps cheat]