How to overwrite your save file in 2 easy steps

1. Accidentally click on the Automatic save instead of your character's save file.
2. Choose Save & Quit. (Because the Quit option warns it will delete the save file).

The original save file has now been overwritten by the automatic save

 

I think "just quit" means you go back to the menu without saving. I dont think it actually deletes your character.

 

It says that it will delete the save file, if you are playing with permadeath, at least.

 

I just tried it and even though it says it will "100% kill your character forever!" it actually doesnt.

 

My problem isn't that Quit doesn't delete your save file, it is that Save & Quit does...