DATABASE ERROR:

SELECT i.*,
                       a.id as cat_id,
					   a.form_id,
                       a.NSLeft as NSLeft,
                       a.NSRight as NSRight,
                       a.title as cat_title,
                       a.title as category,
                       a.public as public,
                       a.thumb1 as thumb1,
                       a.thumb2 as thumb2,
                       a.thumbsqr as thumbsqr,
                       u.nickname as user,
                       u.is_deleted as user_is_deleted,
                       u.login as user_login
                FROM cms_board_items i
				INNER JOIN cms_board_cats a ON a.id = i.category_id
				LEFT JOIN cms_users u ON u.id = i.user_id
                WHERE i.id = '5'

Unknown column 'a.form_id' in 'field list'