Comment 8 for bug 855155

This is how I got to this point. I issued a bzr commit that removed a couple of files:

iko@anthem:/etc/network$ sudo bzr commit -m "Issue a conntrack flush when changing the routing so we don't end up with packets falling in the wrong interface"
[...]
missing gdm/failsafeBlacklist
modified gdm/failsafeBlacklist
missing gdm/failsafeXServer
modified gdm/failsafeXServer
missing gdm/failsafeXinit
modified gdm/failsafeXinit
[...]
Committed revision 308.

kiko@anthem:/etc/network$ sudo bzr uncommit
  308 Christian Reis 2011-11-18
      Issue a conntrack flush when changing the routing so we don't end up with packets falling in the wrong interface

The above revision(s) will be removed.
Uncommit these revisions? [y/n]: y
bzr: ERROR: An inconsistent delta was supplied involving 'gdm/failsafeBlacklist', 'failsafeblacklist-20101011211133-ux797y0aieyjrmnf-718'
reason: Unable to find block for this record. Was the parent added?