Unable to commit on patch created by other member of team

git review -R
remote: 
remote: Processing changes: refs: 1
remote: Processing changes: refs: 1, done            
To ssh://gerrit.wikimedia.org:29418/mediawiki/extensions/ORES
 ! [remote rejected] HEAD -> refs/for/master%topic=T256950 (cannot add patch set to 634994.)
error: failed to push some refs to 'ssh://XXXXXXXX@gerrit.wikimedia.org:29418/