How do i update the map to a new version instead of creating a whole new code.

Everytime i wanna update i have to make a new code which makes it unusable for example i make a game and lets say 1k people play it and they would probably join from the recent tab and favourites but what if i find a bug and want to update it? i just have to make a new game instead of a new version (by version i mean the “v” at the end of the code so like 123-123-123v3)