Database Error; SQL: SELECT
DISTINCT
`t`.*
FROM `wp_posts` AS `t`
WHERE ( ( `kategorie`.`slug` = "tiefbau" ) AND ( `t`.`post_type` = 'fahrzeug' ) AND ( `t`.`post_status` IN ( 'publish' ) ) )
ORDER BY `t`.`menu_order` ASC, `t`.`menu_order`, `t`.`post_title`, `t`.`post_date`; Response: Unknown column 'kategorie.slug' in 'WHERE'
