Description of problem:
I ran dnf on cli as root while yumex-dnf was still running as admin user.

Version-Release number of selected component:
dnf-1.1.3-1.fc23

Additional info:
reporter:       libreport-2.6.3
cmdline:        /usr/bin/python3 -OO /usr/bin/dnf remove cups cups-filters
executable:     /usr/bin/dnf
kernel:         4.2.3-300.fc23.x86_64
runlevel:       N 5
type:           Python3

Truncated backtrace:
history.py:825:_commit:sqlite3.OperationalError: database is locked

Traceback (most recent call last):
  File "/usr/bin/dnf", line 35, in <module>
    main.user_main(sys.argv[1:], exit_code=True)
  File "/usr/lib/python3.4/site-packages/dnf/cli/main.py", line 198, in user_main
    errcode = main(args)
  File "/usr/lib/python3.4/site-packages/dnf/cli/main.py", line 84, in main
    return _main(base, args)
  File "/usr/lib/python3.4/site-packages/dnf/cli/main.py", line 144, in _main
    ret = resolving(cli, base)
  File "/usr/lib/python3.4/site-packages/dnf/cli/main.py", line 173, in resolving
    base.do_transaction(display=displays)
  File "/usr/lib/python3.4/site-packages/dnf/cli/cli.py", line 228, in do_transaction
    super(BaseCli, self).do_transaction(display)
  File "/usr/lib/python3.4/site-packages/dnf/base.py", line 604, in do_transaction
    self._run_transaction(cb=cb)
  File "/usr/lib/python3.4/site-packages/dnf/base.py", line 662, in _run_transaction
    [], [], cmdline)
  File "/usr/lib/python3.4/site-packages/dnf/yum/history.py", line 1019, in beg
    self._commit()
  File "/usr/lib/python3.4/site-packages/dnf/yum/history.py", line 825, in _commit
    return self._conn.commit()
sqlite3.OperationalError: database is locked

Local variables in innermost frame:
self: <dnf.yum.history.YumHistory object at 0x7f9cfc17f748>