[Qt-creator] Why I can't push any changes to wip/qbs branch?

[Loaden]

loaden at qpsoft:~/qpSOFT/Projects/QtCreator$ git push gerrit
HEAD:refs/for/wip/qbsCounting objects: 5, done.
Delta compression using up to 2 threads.
Compressing objects: 100% (3/3), done.
Writing objects: 100% (3/3), 333 bytes, done.
Total 3 (delta 2), reused 0 (delta 0)
remote: Resolving deltas:   0% (0/2)
To ssh://loaden@codereview.qt-project.org:29418/qt-creator/qt-creator
 ! [remote rejected] HEAD -> refs/for/wip/qbs (prohibited by Gerrit)
error: failed to push some refs to 'ssh://
loaden at codereview.qt-project.org:29418/qt-creator/qt-creator'


-- 
Best Regards
Yuchen
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