Comment 1 for bug 494445

<cjwatson@sarantium ~/src/ubuntu/dpkg-cross/crossbuild>$ bzr -Derror import-dsc ../dpkg-cross_2.5.2ubuntu2~cross*.dsc
bzr: ERROR: bzrlib.errors.BzrCommandError: Unable to find the tag for the previous upstream version, 2.5.2ubuntu1, in the branch: upstream-2.5.2ubuntu1

Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 842, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 1037, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 654, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/home/cjwatson/.bazaar/plugins/builddeb/cmds.py", line 732, in run
    db.upstream_tag_name(last_version.upstream_version)))
BzrCommandError: Unable to find the tag for the previous upstream version, 2.5.2ubuntu1, in the branch: upstream-2.5.2ubuntu1