Doriathren Curses

Database Error; SQL: SELECT DISTINCT `t`.* FROM `wp_posts` AS `t` LEFT JOIN `wp_term_relationships` AS `rel_language` ON `rel_language`.`object_id` = `t`.`ID` LEFT JOIN `wp_term_taxonomy` AS `rel_tt_language` ON `rel_tt_language`.`taxonomy` = 'language' AND `rel_tt_language`.`term_taxonomy_id` = `rel_language`.`term_taxonomy_id` LEFT JOIN `wp_terms` AS `language` ON `language`.`term_id` = `rel_tt_language`.`term_id` LEFT JOIN `wp_term_relationships` AS `polylang_languages` ON `polylang_languages`.`object_id` = `t`.`ID` AND `polylang_languages`.`term_taxonomy_id` = 1820 WHERE ( ( ( `language`.`slug` = 'sindarin' OR `language`.`slug`='doriath' ) AND ( `topics`.`slug` = 'curse' ) ) AND ( `t`.`post_type` = "phrase" ) AND ( `polylang_languages`.`object_id` IS NOT NULL ) AND ( `t`.`post_status` IN ( "publish" ) ) ) ORDER BY `t`.`menu_order`, `t`.`post_title`, `t`.`post_date`; Response: Unknown column 'topics.slug' in 'where clause'