WordPress database error: [Incorrect DATETIME value: '']
SELECT p.ID FROM wp_posts AS p INNER JOIN wp_postmeta pm ON p.ID = pm.post_id WHERE pm.meta_key = '_audiotheme_gig_datetime' AND CAST( pm.meta_value AS DATETIME ) < '' AND p.post_type = 'audiotheme_gig' AND p.post_status = 'publish' ORDER BY pm.meta_value DESC, p.post_title ASC LIMIT 1

WordPress database error: [Incorrect DATETIME value: '']
SELECT p.ID FROM wp_posts AS p INNER JOIN wp_postmeta pm ON p.ID = pm.post_id WHERE pm.meta_key = '_audiotheme_gig_datetime' AND CAST( pm.meta_value AS DATETIME ) > '' AND p.post_type = 'audiotheme_gig' AND p.post_status = 'publish' ORDER BY pm.meta_value ASC, p.post_title ASC LIMIT 1