Broken Admin Menu, How Can I Repair It? A while back I upgraded from D6 to D7 using the Drupal upgrade script. A bug that's lingered in my system is broken menus.

For example, on /admin I have a link for both "People" (/admin/people) and "User management" (/admin/user). The link for "User management" is dead, it goes to /admin, and I believe it is a carryover from the D6 install. I can give many more examples if necessary.

Is there a way to remove the broken menu items without affecting my working D7 menu items?

Thanks in advance to anyone that helps!
Unfortunately—and this is not an ideal solution, but seems to be what everyone is using successfully—I have had to use the following brute-force SQL statement in the past. 

First, backup your entire Drupal database!

Then, execute this in your favorite SQL manager:

DELETE FROM menu_links WHERE module = 'system';


Then visit /admin/config/development/performance and clear the cache.


taken from https://drupal.org/node/865702#comment-4015758