using --force-with-lease after git rebase

I have been confused about the need for --force-with-lease after rebasing

Imagine I have a feature branch:

git checkout --no-track -b 'feature' 'origin/dev' git push -u origin feature

I do some work, and then I rebase against origin/dev to keep up to date with the integration branch.

git fetch origin/dev git rebase origin/dev

then I try to push to the remote

git push origin feature

but that is rejected, I have to do:

git push --force-with-lease origin feature

why is that? Why do I need to force push my feature branch to the remote tracking branch after rebasing against the integration branch?

-alex

related question: https://stackoverflow.com/questions/52823692/git-push-force-with-lease-vs-force/53042745#53042745