Description of problem:
I executed 'sudo dnf update'

Version-Release number of selected component:
dnf-0.4.4-1.fc20

Additional info:
reporter:       libreport-2.1.8
cmdline:        /usr/bin/python /bin/dnf update
executable:     /bin/dnf
kernel:         3.11.5-300.fc20.x86_64
runlevel:       N 5
type:           Python
uid:            0

Truncated backtrace:
package.py:109:repo:KeyError: '@System'

Traceback (most recent call last):
  File "/bin/dnf", line 35, in <module>
    main.user_main(sys.argv[1:], exit_code=True)
  File "/usr/lib/python2.7/site-packages/dnf/cli/main.py", line 272, in user_main
    errcode = main(args)
  File "/usr/lib/python2.7/site-packages/dnf/cli/main.py", line 64, in main
    return _main(base, args)
  File "/usr/lib/python2.7/site-packages/dnf/cli/main.py", line 187, in _main
    return_code, resultmsgs = base.do_transaction()
  File "/usr/lib/python2.7/site-packages/dnf/cli/cli.py", line 185, in do_transaction
    self.download_callback_total_cb)
  File "/usr/lib/python2.7/site-packages/dnf/yum/base.py", line 1024, in download_packages
    remote_pkgs = filter(lambda po: not (po.from_cmdline or po.repo.local), pkglist)
  File "/usr/lib/python2.7/site-packages/dnf/yum/base.py", line 1024, in <lambda>
    remote_pkgs = filter(lambda po: not (po.from_cmdline or po.repo.local), pkglist)
  File "/usr/lib/python2.7/site-packages/dnf/package.py", line 109, in repo
    return self.yumbase.repos[self.reponame]
KeyError: '@System'

Local variables in innermost frame:
self: <hawkey.Package object id 2358, sysvinit-tools-2.88-14.dsf.fc20.x86_64, @System>