Problem with Gerrit merge

Hi all,

I’ve tried to merge approved change,249

by myself. I’ve followed manual

and executed

git fetch refs/changes/49/249/1 && git checkout FETCH_HEAD
git checkout -b missing_braces
git checkout 1.0
git pull gerrit 1.0
git merge --no-ff missing_braces
git push gerrit

but got an error:

! [remote rejected] 1.0 -> 1.0 (prohibited by Gerrit)

Do I do anything wrong?