This question already has an answer here:
It happened many times that I submit an
Edit Suggestion and immediately after that I see the post has already been edited by another guy (usually higher-rep) and my edit has been rejected by either Community or reviewers.
Why there is no mechanism to prevent simultaneous edits and avoid unfair rejection?
This is my first attempt to edit the post:
As you can see it got rejected by community because another user submitted an edit. And immediately after that I wanted to re-edit my edit which turned to this (Actually it rolled back all the edits):