ERROR - MySql Query

FILE: /var/www/html/games4fans.it/application/category/category.model.php

LINE: 62

QUERY: SELECT c.category_id AS id, c.category_title_it AS titolo, c.category_description_it AS descrizione, c.category_seo_slug_it AS seo_slug, c.is_visible AS visibile, m.media_type, m.media_path FROM tbl_category c LEFT JOIN lnk_media_category j ON c.category_id = j.category_id LEFT JOIN tbl_media m ON j.media_id = m.media_id WHERE c.is_visible=1 AND c.parent_id=Array GROUP BY c.category_id ORDER BY c.category_order, c.category_title_it, j.media_order

ERROR: [1054] Unknown column 'Array' in 'where clause'