Does a new game delete saves

Just wondering, if you start a new game does it delete all saves or just over write them as you go?

you can have a number of playlines… think it is 9 or 10.
When startig a new one it ask you to selec a number.

Thanks.
I don’t want to tempt fate but so far have only had 1 bug where i can’t complete pick poketing with Peshek, and got stuck in the trees a few times. Am a fair way into game but was thinking starting a new game now I know how the game plays with fighting & so on. I am on PS4.

no idea how tings are on PS4, but in my save game folder (on PC) I got the two different games I have each in a folder named “playlineX” with x being the number.

And when ever I want to load a game, I first select playline then the actual savegame.

(actually they are numbered 0 and 6 in the folder but 1 and 7 in the game…)

I am backing up frequently on USB. So if it wipes all saves I can just reload.

I can’t understand why so many people are having troubles with crashing etc. & other people have none or hardly any problems.

Maybe they have to many items in their inventory? Something I learned while playing I had like 50,000 coin worth of items in my chest when I went to take them all out to sell my game kept crashing because it couldn’t handle that amount of items. It would even crash when I wasn’t anywhere near my chest but when I finally got them all sold I haven’t crashed since.