Backup your save to USB or the cloud. Delete the game from your PS4. Go into the system settings and turn off automatically install updates.any way to delete game data/patch on PS4 to be able to continue to do this?
Reinstall the game and when it downloads the update just don't install.
You won't be able to play online without the patch, but the dupe glitch will be there. You could technically glitch until you are the level you want, THEN reinstall the patch and go back online.