How about... the "edit" is just the creation of a new post but bound by the initial post / post's ID?

Ex:

Post-id-1:0

*User edits and posts new edit

Post-id-1:1

And there'd be a "view post edit history" section that shows all of the posts they've edited before the latest one with the highest numeral value (ex: post-id-1:10 is shown, and :9 to :0 is shown in history)

So instead of adjusting data, it's creating new ones, and showcasing the latest one and filing previous ones.