A Database Error Occurred

Error Number: 1054

Unknown column 'p2.parent_id' in 'on clause'

SELECT p3.* FROM (pages p1) JOIN pages p2 ON p2.parent_id = p1.id JOIN pages p3 ON p3.parent_id = p2.id WHERE `p1`.`slug` = '2009' AND `p2`.`slug` = 'en' AND `p3`.`slug` = 'home.html' LIMIT 1