trac-admin /srv/trac permission add developer WIKI_ADMIN REPORT_ADMIN ROADMAP_ADMIN TICKET_ADMIN
Traceback (most recent call last):
  File "/usr/bin/trac-admin", line 8, in <module>
    load_entry_point('Trac==0.11b2', 'console_scripts', 'trac-admin')()
  File "/usr/lib/python2.5/site-packages/Trac-0.11b2-py2.5.egg/trac/admin/console.py", line 1227, in run
    return admin.onecmd(command)
  File "/usr/lib/python2.5/site-packages/Trac-0.11b2-py2.5.egg/trac/admin/console.py", line 103, in onecmd
    rv = cmd.Cmd.onecmd(self, line) or 0
  File "/usr/lib/python2.5/cmd.py", line 219, in onecmd
    return func(arg)
  File "/usr/lib/python2.5/site-packages/Trac-0.11b2-py2.5.egg/trac/admin/console.py", line 394, in do_permission
    self._do_permission_add(user, action)
  File "/usr/lib/python2.5/site-packages/Trac-0.11b2-py2.5.egg/trac/admin/console.py", line 430, in _do_permission_add
    self._permsys.grant_permission(user, action)
  File "/usr/lib/python2.5/site-packages/Trac-0.11b2-py2.5.egg/trac/perm.py", line 320, in grant_permission
    self.store.grant_permission(username, action)
  File "/usr/lib/python2.5/site-packages/Trac-0.11b2-py2.5.egg/trac/perm.py", line 226, in grant_permission
    (username, action))
  File "/usr/lib/python2.5/site-packages/Trac-0.11b2-py2.5.egg/trac/db/util.py", line 50, in execute
    return self.cursor.execute(sql_escape_percent(sql), args)
  File "/usr/lib/python2.5/site-packages/Trac-0.11b2-py2.5.egg/trac/db/util.py", line 50, in execute
    return self.cursor.execute(sql_escape_percent(sql), args)
psycopg2.IntegrityError: duplicate key value violates unique constraint "permission_pk"