That's because the devs always decide to rework stuff they already did. This changes the params, vars, triggers, whatever. So since events are changed, the saves become useless.what's the whole deal with the old saves not working? I just finished the game a couple of days ago and spent a lot of time on it... I really don't feel like doing it all again...
If you ask me, that's a stupid thing to do at the moment, as seen here in 10000 replies. The story was OK since at least 1 year ago, it should've been left like it was and simply add content for other chars and maybe continue content for old chars.
That way the save files would be compatible.
There are a lot of bad decisions in this project. But hey, if you get an update after 6 months, you can replay the entire game anyway. Well, as long as the content is worth, not like this one now.