11eebe6b6b61ebd5afc42a7d6e17ceefc507af8b

The "commit already exists" error is similar to "no new changes", but occurs if the user tries to push to `refs/changes/n` when the commit already exists on change `n`. Change-Id: Ifc558d7adc59fb8df5690dfe879b7cc3574ff9f2
Description
RETIRED, Gerrit as used by OpenStack