Cannot add TICKET_CREATE permission to "developers"

[anonymous]

In the administration system I tried to add TICKET_CREATE permission to "developers" and system fail with the following error:

Python Traceback

Traceback (most recent call last):
  File "/data/devjavu/current/trac/lib/trac/web/main.py", line 420, in dispatch_request
    dispatcher.dispatch(req)
  File "/data/devjavu/current/trac/lib/trac/web/main.py", line 243, in dispatch
    resp = chosen_handler.process_request(req)
  File "/data/devjavu/releases/20080301064410/trac/src/plugins/webadmin/webadmin/web_ui.py", line 109, in process_request
    path_info)
  File "/data/devjavu/releases/20080301064410/trac/src/plugins/webadmin/webadmin/perm.py", line 45, in process_admin_request
    perm.grant_permission(subject, action)
  File "/data/devjavu/current/trac/lib/trac/perm.py", line 210, in grant_permission
    self.store.grant_permission(username.lower(), action)
  File "/data/devjavu/current/trac/lib/trac/perm.py", line 154, in grant_permission
    (username, action))
  File "/data/devjavu/current/trac/lib/trac/db/util.py", line 50, in execute
    return self.cursor.execute(sql_escape_percent(sql), args)
  File "/data/devjavu/current/trac/lib/trac/db/sqlite_backend.py", line 56, in execute
    args or [])
  File "/data/devjavu/current/trac/lib/trac/db/sqlite_backend.py", line 48, in _rollback_on_error
    return function(self, *args, **kwargs)
IntegrityError: columns username, action are not unique

[Emmanuel Blot]

Please read the guidelines to create ticket and learn how to report an issue:

• this error has been reported several times, it's quite easy to locate duplicate:
  searching for "columns username, action are not unique" does the trick
• this is not a blocker issue - although an important one
• please use verbatim block(s) to quote any error message
• please always report the version of Trac you're using

Duplicate of #6348