“Error in Category Icons : you must deactivate and reactivate this plugin”

Problem :

I’m getting an error message when I get to the Manage Categories page: Error in Category Icons : you must deactivate and reactivate this plugin.

So far, I’ve deactivated and reactivated the plugin, but the problem is not resolved.

Solution :

A very few people encountered this issue. This is when you upgrade from a version older than 1.7 to a new one : there is a new field addedd in the table, named priority, since 1.7, to manage icons priority. Continue reading