I wanted to edit trophies (got a lot of them, but thought I would never achieve online ones, because of obvious reasons, and still wanted to platinum this game), unlocking the last two of them.
They unlocked, but then other trophies were disabled to unlock - no matter what I do, they won't unlock.
So I reverted them back, and still no luck, they weren't unlocked. Deleting saves and game data also won't work, seems like the game has a protection - if the trophies earned don't match with the achievements in the Profile Save data, game lock trophies.
It's just FYI. Do not mess with savegames and trophies