The quest cleared screen you will go to the save data screen and during this time if the cheats are not disabled you might get the data corrupted error message(THE DATA MIGHT ACTUALLY GET CORRUPTED EVEN THOUGH IT'S AN ERROR MESSAGE :o ).
disable the cheats when you finish the quest(objective cleared ) because after only enable cheats when you are in the village or when you are on a quest. do not enable cheats during the start of the game(title screen,character loading screen etc). enable the cheats when you are only on a quest. These are occurring because certain games have safety mechanisms so that people cannot use cheats on them but thanks to certain people who found certain ways to bypass this issue.
*Those of you who are having trouble saving the game(data corrupted error message) try doing the following things.
These are some of the basic working cheats, there are more cheats for this game but right now I'm only posting the basic cheats.