conflict between k2 opengraph plugin and k2 frontend item submission

I posted this issue some months ago.

www.sourcecoast.com/forums/jfbconnect/jf...tend-item-submission

Now the problem is back

K2 feature "submit item" (through frontend) does not work if K2 opengraph plugin is activated.

Error message in K2: "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 parent FROM *****_k2_categories WHERE id ="

Submission of k2 articles for users is only possible if the k2 opengraph plugin is disabled.

Joomla 3.5.1
K2: 2.7
JFB Connect 7.0.2
PHP 7

Regards
Randolph