Comment 4 for bug 1156932

"nova boot" has a similar problem. You get a 500 when attempting to use a duplicated (by name) security group:

DEBUG (shell:768) The server has either erred or is incapable of performing the requested operation. (HTTP 500) (Request-ID: req-aded6143-c8d0-45fa-abd3-fd28a80cfd0d)
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/novaclient/shell.py", line 765, in main
    OpenStackComputeShell().main(map(strutils.safe_decode, sys.argv[1:]))
  File "/usr/lib/python2.7/dist-packages/novaclient/shell.py", line 701, in main
    args.func(self.cs, args)
  File "/usr/lib/python2.7/dist-packages/novaclient/v1_1/shell.py", line 282, in do_boot
    server = cs.servers.create(*boot_args, **boot_kwargs)
  File "/usr/lib/python2.7/dist-packages/novaclient/v1_1/servers.py", line 600, in create
    **boot_kwargs)
  File "/usr/lib/python2.7/dist-packages/novaclient/v1_1/base.py", line 163, in _boot
    return_raw=return_raw, **kwargs)
  File "/usr/lib/python2.7/dist-packages/novaclient/base.py", line 145, in _create
    _resp, body = self.api.client.post(url, body=body)
  File "/usr/lib/python2.7/dist-packages/novaclient/client.py", line 233, in post
    return self._cs_request(url, 'POST', **kwargs)
  File "/usr/lib/python2.7/dist-packages/novaclient/client.py", line 217, in _cs_request
    **kwargs)
  File "/usr/lib/python2.7/dist-packages/novaclient/client.py", line 199, in _time_request
    resp, body = self.request(url, method, **kwargs)
  File "/usr/lib/python2.7/dist-packages/novaclient/client.py", line 193, in request
    raise exceptions.from_response(resp, body, url, method)
ClientException: The server has either erred or is incapable of performing the requested operation. (HTTP 500) (Request-ID: req-aded6143-c8d0-45fa-abd3-fd28a80cfd0d)
ERROR: The server has either erred or is incapable of performing the requested operation. (HTTP 500) (Request-ID: req-aded6143-c8d0-45fa-abd3-fd28a80cfd0d)

Full debug output: http://paste.ubuntu.com/5751746/