bb won't allow pushing to empty patch queue

{{{
faheem@orwell:~/snppy-paper_plos/.hg/patches-plos$ hg paths
default = ssh://bulldog_hg//srv/hg/faheem/snppy-paper/.hg/patches-plos
bbmq = ssh://hg@bb/faheem/snppy-paper-patches-plos
faheem@orwell:~/snppy-paper_plos/.hg/patches-plos$ hg pus bbmq
pushing to ssh://hg@bb/faheem/snppy-paper-patches-plos
searching for changes
searching [ <=> ]
abort: repository is unrelated
}}}

The snppy-paper-patches-plos is currently empty, so I'm not sure what the message is talking about. BB creates an automated init, but I just stripped that.