Larian Studios Forums Divinity - Original Sin Divinity Original Sin - Mods Cheat Engine Value Reset? (and a quick guide)

I use the gog-version of the game, so the tables for the Cheat Engine from the steam-version do not work. I planned to create gog-tables, but so far I ran into an issue:
I found the memory location for Available Ability Points. When I change them in game they also change correctly in Cheat Engine, but when set to something in the Cheat Engine, the change does not appear in the game, the value is overridden again with whatever the game previously had.

Does anyone know more about this?