1064: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'AND   
			wall_item.item_id != this_item.item_id
		GROUP BY 
			wall_item.ite...' at line 14
SELECT 
			wall_item.item_id, 
			wall_item.title,
			wall_item.client,
			wall_item.sidebar_image,
			wall_item.slug,
			YEAR(wall_item.date) AS date,
			COUNT(DISTINCT similar.tag_id) as shared_tags 
		FROM 
			wall_item INNER JOIN ( wall_item_has_tag AS this_item INNER JOIN wall_item_has_tag AS similar USING (tag_id) )
			ON similar.item_id = wall_item.item_id
		WHERE 
			this_item.item_id = 
		AND   
			wall_item.item_id != this_item.item_id
		GROUP BY 
			wall_item.item_id
		ORDER BY 
			shared_tags DESC
		LIMIT
			7