RelationShips Fix

    /**
     * Delete all relationships to an object.
     *
     * @param int    $object_id ID of the object metadata is for.
     * @param string $type      The relationship type.
     * @param string $target    The relationship target.
     */
    protected function delete_object_relationships( $object_id, $type, $target ) {
        global $wpdb;

        $sql = $target
            ? "DELETE FROM $wpdb->mb_relationships WHERE `type`=%s AND `$target`=%d"
            : "DELETE FROM $wpdb->mb_relationships WHERE `type`=%s AND (`from`=%d OR `to`=%d)";

        if($target):
            $wpdb->query(
                $wpdb->prepare(
                    $sql,
                    $type,
                    $object_id
                )
            );
        else:
            $wpdb->query(
                $wpdb->prepare(
                    $sql,
                    $type,
                    $object_id,
                    $object_id
                )
            );
        endif;

    }