git import failed (Unknown extra fields in <Commit ...>: ['gpgsig'].

Hi,

on git import I get this error: (http://launchpadlibrarian.net/165541699/jff-de-bind10-trunk.log)

#####
2014-02-10 14:38:11 INFO Starting job.
2014-02-10 14:38:11 INFO Getting exising bzr branch from central store.
2014-02-10 14:38:11 INFO [chan bzr SocketAsChannelAdapter] Opened sftp connection (server version 3)
2014-02-10 14:38:12 INFO [chan bzr SocketAsChannelAdapter] Opened sftp connection (server version 3)
2014-02-10 14:38:14 INFO 52 bytes transferred
2014-02-10 14:38:14 INFO Importing branch.
2014-02-10 14:38:18 INFO Counting objects: 146992 0
2014-02-10 14:38:58 INFO finding revisions to fetch:generating index 0/160748
2014-02-10 14:39:33 INFO finding revisions to fetch:generating index 0/160748
2014-02-10 14:39:58 INFO finding revisions to fetch 1/36903
2014-02-10 14:39:58 INFO
Traceback (most recent call last):
  File "/srv/importd.launchpad.net/production/launchpad-rev-16916/scripts/code-import-worker.py", line 95, in <module>
    sys.exit(script.main())
  File "/srv/importd.launchpad.net/production/launchpad-rev-16916/scripts/code-import-worker.py", line 90, in main
    return import_worker.run()
  File "/srv/importd.launchpad.net/production/launchpad-rev-16916/lib/lp/codehosting/codeimport/worker.py", line 586, in run
    return self._doImport()
  File "/srv/importd.launchpad.net/production/launchpad-rev-16916/lib/lp/codehosting/codeimport/worker.py", line 740, in _doImport
    inter_branch.fetch(limit=revision_limit)
  File "/srv/importd.launchpad.net/production/launchpad-rev-16916/bzrplugins/git/branch.py", line 722, in fetch
    self.fetch_objects(stop_revision, fetch_tags=fetch_tags, limit=limit)
  File "/srv/importd.launchpad.net/production/launchpad-rev-16916/bzrplugins/git/branch.py", line 745, in fetch_objects
    determine_wants, self.source.mapping, limit=limit)
  File "/srv/importd.launchpad.net/production/launchpad-rev-16916/bzrplugins/git/fetch.py", line 718, in fetch_objects
    limit)
  File "/srv/importd.launchpad.net/production/launchpad-rev-16916/bzrplugins/git/fetch.py", line 484, in import_git_objects
    mapping.revision_id_foreign_to_bzr)
  File "/srv/importd.launchpad.net/production/launchpad-rev-16916/bzrplugins/git/mapping.py", line 334, in import_commit
    raise UnknownCommitExtra(commit, [item[0] for item in commit.extra])
bzrlib.plugins.git.errors.UnknownCommitExtra: Unknown extra fields in <Commit 12efec3477feb62d7cbe36bdcfbfc7aa28a36f57>: ['gpgsig'].
Import failed:
Traceback (most recent call last):
Failure: twisted.internet.error.ProcessTerminated: A process has ended with a probable error condition: process ended with exit code 1.
#####

Any hints?

Thanks

Jörg