### Please describe the problem.
I was trying to use "Local Computer" option to sync up two machines on my local network. I was having some firewall issues and it failed on one machine.
It still created a repository without a name in the web ui and i get that Error unknown UUID when trying to edit or delete it.

### What steps will reproduce the problem?
Machine A initiates pairing. Machine B accepts pairing. Machine A has a firewall blocking outgoing connections.
Machine B times out. Machine A accepts outgoing connections for vnetd. Machine A starts syncing with Machine B.
Machine B gets files but have a broken web ui.


### What version of git-annex are you using? On what operating system?

4.20130601-g2b6c3f2
OSX 10.7.5 on both Machine A and B

### Please provide any additional information below.

[[!format sh """
# If you can, paste a complete transcript of the problem occurring here.
# If the problem is with the git-annex assistant, paste in .git/annex/daemon.log


# End of transcript or log.
"""]]