How Do I Delete Versions

I am about 150 versions deep into a project and ever since v139 I haven’t been able to get the ai to produce anything that doesnt have bugs in it. When I try and ask for the bot to revert to v139 it says that it did so but then the same issues persist. Please tell me someone knows how to do it cause I swear I cannot seem to find out how

What happens if you scroll back and click “Restore” or “View” on version 139?