Hey!
First of all, thank you for playing!
…Especially when the developer, me, seems to have made quite a serious mistake. I believe I messed up rather badly regarding save files. Without going into too much detail, several changes I made ended up affecting some older saves.
I will try to see if there is any way to fix it, but unfortunately, the chances seem rather slim.
Because of that, starting a new game may be necessary.
I sincerely apologize.