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neutron-server crashing on controller

I am on CentOS 6.4 and trying to setup Neutron. Unfortunately I'm getting a crash when starting on this server. The server.log file is...

2013-11-25 23:41:16.756 8105 INFO neutron.common.config [-] Logging enabled!
2013-11-25 23:41:16.757 8105 ERROR neutron.common.legacy [-] Skipping unknown group key: firewall_driver
2013-11-25 23:41:16.762 8105 INFO neutron.common.config [-] Config paste file: /etc/neutron/api-paste.ini
2013-11-25 23:41:16.822 8105 INFO neutron.manager [-] Loading Plugin: neutron.plugins.openvswitch.ovs_neutron_plugin.OVSNeutronPluginV2
2013-11-25 23:41:16.974 8105 INFO neutron.plugins.openvswitch.ovs_neutron_plugin [-] Network VLAN ranges: {}
2013-11-25 23:41:17.009 8105 INFO neutron.plugins.openvswitch.ovs_neutron_plugin [-] Tunnel ID ranges: [(1, 1000)]
2013-11-25 23:41:17.093 8105 ERROR neutron.service [-] In serve_wsgi()
2013-11-25 23:41:17.093 8105 TRACE neutron.service Traceback (most recent call last):
2013-11-25 23:41:17.093 8105 TRACE neutron.service   File "/usr/lib/python2.6/site-packages/neutron/service.py", line 96, in serve_wsgi
2013-11-25 23:41:17.093 8105 TRACE neutron.service     service.start()
2013-11-25 23:41:17.093 8105 TRACE neutron.service   File "/usr/lib/python2.6/site-packages/neutron/service.py", line 65, in start
2013-11-25 23:41:17.093 8105 TRACE neutron.service     self.wsgi_app = _run_wsgi(self.app_name)
2013-11-25 23:41:17.093 8105 TRACE neutron.service   File "/usr/lib/python2.6/site-packages/neutron/service.py", line 109, in _run_wsgi
2013-11-25 23:41:17.093 8105 TRACE neutron.service     app = config.load_paste_app(app_name)
2013-11-25 23:41:17.093 8105 TRACE neutron.service   File "/usr/lib/python2.6/site-packages/neutron/common/config.py", line 144, in load_paste_app
2013-11-25 23:41:17.093 8105 TRACE neutron.service     app = deploy.loadapp("config:%s" % config_path, name=app_name)
2013-11-25 23:41:17.093 8105 TRACE neutron.service   File "/usr/lib/python2.6/site-packages/PasteDeploy-1.5.0-py2.6.egg/paste/deploy/loadwsgi.py", line 247, in load
app
<snip>
2013-11-25 23:41:17.098 8105 TRACE neutron   File "/usr/lib/python2.6/site-packages/oslo/config/cfg.py", line 1583, in __inner
2013-11-25 23:41:17.098 8105 TRACE neutron     result = f(self, *args, **kwargs)
2013-11-25 23:41:17.098 8105 TRACE neutron   File "/usr/lib/python2.6/site-packages/oslo/config/cfg.py", line 1743, in register_cli_opts
2013-11-25 23:41:17.098 8105 TRACE neutron     self.register_cli_opt(opt, group, clear_cache=False)
2013-11-25 23:41:17.098 8105 TRACE neutron   File "/usr/lib/python2.6/site-packages/oslo/config/cfg.py", line 1587, in __inner
2013-11-25 23:41:17.098 8105 TRACE neutron     return f(self, *args, **kwargs)
2013-11-25 23:41:17.098 8105 TRACE neutron   File "/usr/lib/python2.6/site-packages/oslo/config/cfg.py", line 1735, in register_cli_opt
2013-11-25 23:41:17.098 8105 TRACE neutron     raise ArgsAlreadyParsedError("cannot register CLI option")
2013-11-25 23:41:17.098 8105 TRACE neutron ArgsAlreadyParsedError: arguments already parsed: cannot register CLI option
2013-11-25 23:41:17.098 8105 TRACE neutron

What appears to be wrong?