reposync error

Wed Aug  6 12:36:28 2014 - INFO | running: /usr/bin/debmirror --nocleanup --verbose --ignore-release-gpg --method=http --host=archive.ubuntu.com --root=/ubuntu/dists --dist=precise,precise-security --section=main,universe /var/www/cobbler/repo_mirror/precise-x86_64 --nosource -a amd64
Wed Aug  6 12:38:28 2014 - INFO | received on stdout: Mirroring to /var/www/cobbler/repo_mirror/precise-x86_64 from http://archive.ubuntu.com/ubuntu/dists/
Arches: amd64
Dists: precise,precise-security
Sections: main,main/debian-installer,contrib,non-free,main,universe
Pdiff mode: use
Will NOT clean up.
Attempting to get lock ...

Wed Aug  6 12:38:28 2014 - DEBUG | received on stderr: Archive-Update-in-Progress-localhost exists or you lack proper permissions; aborting at /usr/bin/debmirror line 858.

Wed Aug  6 12:38:28 2014 - INFO | Exception occured: <class 'cobbler.cexceptions.CX'>
Wed Aug  6 12:38:28 2014 - INFO | Exception value: 'cobbler reposync failed'
Wed Aug  6 12:38:28 2014 - INFO | Exception Info:
  File "/usr/lib/python2.7/site-packages/cobbler/utils.py", line 126, in die
    raise CX(msg)

Wed Aug  6 12:38:28 2014 - INFO | Exception occured: <class 'cobbler.cexceptions.CX'>
Wed Aug  6 12:38:28 2014 - INFO | Exception value: 'cobbler reposync failed'
Wed Aug  6 12:38:28 2014 - INFO | Exception Info:
  File "/usr/lib/python2.7/site-packages/cobbler/action_reposync.py", line 125, in run
    self.sync(repo)
   File "/usr/lib/python2.7/site-packages/cobbler/action_reposync.py", line 171, in sync
    return self.apt_sync(repo)
   File "/usr/lib/python2.7/site-packages/cobbler/action_reposync.py", line 538, in apt_sync
    utils.die(self.logger,"cobbler reposync failed")
   File "/usr/lib/python2.7/site-packages/cobbler/utils.py", line 134, in die
    raise CX(msg)