You didn't rebase correctly. Because of that, git review
is trying to upload several more commits than just yours.
How many commits are you trying to upload for review? Assuming just one (A c7d455d), and you are working on the master branch:
git fetch
git checkout origin/master
git cherry-pick c7d455d
You then should be able to upload like normal.
If you have multiple commits to upload, you can cherry-pick them in order or use git rebase