The loader can't just "invent" the J letter in the titleID.
It's using the ID you have either in your game's folder name (Title [ID6]), or the ID inside the ISO (the 6 first bytes of the ISO file).
either one of them is wrong and have J in the title ID, or your game is japanese, and gametdb doesn't have that region for this game.
Or the game you ripped (yourself?) doesn't have a correct region ID. You can fix it by editing the ID6 located in the folder's name to [G4IE52]
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The loader can't just "invent" the J letter in the titleID.
It's using the ID you have either in your game's folder name (Title [ID6]), or the ID inside the ISO (the 6 first bytes of the ISO file).
either one of them is wrong and have J in the title ID, or your game is japanese, and gametdb doesn't have that region for this game.
Or the game you ripped (yourself?) doesn't have a correct region ID. You can fix it by editing the ID6 located in the folder's name to [G4IE52]