xcopy file and make new version each time? save1... save2... etc

I’m save scumming Crusader Kings 3 because I make bad decisions and still want achievements. Right now I have a batch script that I double click that overwrites the same file in my backup folder. Is there a way to do incremental saves? So it makes a new version on it’s own every time I click the batch file?

So:
savegame1.ck3
savegame2.ck3
savegame3.ck3

etc.

1 is newest
5 is oldest

copy /y 4.bak 5.bak
copy /y 3.bak 4.bak
copy /y 2.bak 3.bak
copy /y 1.bak 2.bak

/y suppresses the prompts

1.bak is the filename you save the game to