Title doesn't quite make sense but here goes...

I've changed the TitleID/Product Code of a game and when I run it the games DLC is loaded from the default Game, how would I go about stopping this? my end goal is having 2 versions of the game running 2 different versions of DLC.

I have no use for Modified Game to be running Base Game DLC want to create Modified DLC to run on Modified Game.

Thought it would be easy enough to do since DLC looks like its just ProductCode-00 but even with a changed ProductCode its running the DLC.