Navigation Error: Page being updated by another user.

After restoring a site collection to a new managed path I keep getting an error when trying to modify the navigation that states: Pages is being updated by another user. After googling I came across a post stating corrupted navigation headings. This is how I resolved: http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=1691577&SiteID=1

To reset corrupted headings, you have to :
- remove all the lists under corrupted heading
- remove corrupted heading
- From the list settings, add a removed list to the quick launch (This regenerate a non corrupted heading)