WordPress databasefout: [Unknown column 'o.level' in 'where clause']
SELECT o.*,`v`.`id` AS `id_var`,`v`.`name` AS `var_name`,`v`.`inc_price`,`v`.`inc_duration`,`g`.`name` AS `group_name`,`g`.`description` AS `group_description` FROM `wp_vikappointments_option` AS `o` LEFT JOIN `wp_vikappointments_ser_opt_assoc` AS `a` ON `o`.`id` = `a`.`id_option` LEFT JOIN `wp_vikappointments_option_value` AS `v` ON `o`.`id` = `v`.`id_option` LEFT JOIN `wp_vikappointments_option_group` AS `g` ON `g`.`id` = `o`.`id_group` WHERE `a`.`id_service` = 3 AND `o`.`published` = 1 AND `o`.`level` IN (1, 5) ORDER BY `g`.`ordering` ASC,`o`.`ordering` ASC,`v`.`ordering` ASC