Error When Adding new Priority having an existing name

[Kanaan A.]

When you add a new priority having an existing name (the name already exists in the priorities set), an internal error is triggered

Python Traceback
Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/trac/web/main.py", line 406, in dispatch_request
    dispatcher.dispatch(req)
  File "/usr/lib/python2.5/site-packages/trac/web/main.py", line 237, in dispatch
    resp = chosen_handler.process_request(req)
  File "/usr/lib/python2.5/site-packages/TracWebAdmin-0.1.2dev-py2.5.egg/webadmin/web_ui.py", line 119, in process_request
    path_info)
  File "/usr/lib/python2.5/site-packages/TracWebAdmin-0.1.2dev-py2.5.egg/webadmin/ticket.py", line 327, in process_admin_request
    enum.insert()
  File "/usr/lib/python2.5/site-packages/trac/ticket/model.py", line 379, in insert
    (self.type, self.name, self.value))
  File "/usr/lib/python2.5/site-packages/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/db/sqlite_backend.py", line 56, in execute
    args or [])
  File "/usr/lib/python2.5/site-packages/trac/db/sqlite_backend.py", line 48, in _rollback_on_error
    return function(self, *args, **kwargs)
IntegrityError: columns type, name are not unique

[Emmanuel Blot]

Please read NewTicketGuidelines about how to report a useful bug/error.

Your bug report is missing an important information: the Trac version.
Moreover, this is a duplicate which is easy to locate: simply search for the error: columns type, name are not unique
BTW, please use verbatim blocks ({{{}}}) when quoting an error trace.

Dup of #6808