Can any1 help me translate this error from ff-type 0 from Japanese to English?

So ive cleared the game and i wanna play it again but this time dirty! xD
The problem is that when i use one of the codes down below and then try to save i get a error and only way to remove the error is by quiting the game :(
And the thing is i dont even understand what it means which makes the chances of fixing it even slimmer and ive had a bit problem translating it myself cuz i couldnt find most of the signs when writing them on google translate on my phone.
So can any1 help me solve the problem or if not can you at least translate it for me plz?
THANKS ALOT IN ADVANCE!

Don't turn any cheats on until you're prompted to select your save slot in the save menu. Should bypass that error.

Alright thnx alot, ive never gotten that idea before.
Ill let you know if it works! :D

EDIT: It works perfectly! Thnx alloooooot :D