:(
I have installed K2 additional categories plugin for joomla 3.1.5.

When I try to add new K2 Item, it gives me error
1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')}' at line 1 SQL=SELECT `catid` FROM mnc_k2_additional_categories WHERE `itemID` = {intval()}

I tried disabling k2 additional categories from the plugins manager, and then I can add new k2 item again. What could be wrong? I need this plugin to allow me to duplicate k2 item in another category.
Hope someone can help me out.

Thanks.

Update your K2 to version 2.6.8 SVN version located here: getk2.org/assets/get/

If your issue persists you should contact the plugin's support team to help you solve this issue.