When I make a post in Wordpress, you have the option at the top of customizing the permanent link, when I try to change that permanent link is not allowed, I work with some blogs in Wordpress and only one in particular is giving this error. Could you help me?
Wordpress Version: 3.6.1
Custom structure: %category%/%post_id%
However, when I access the post and try to customize the permanent link I can not.