WordPress database error: [Expression #1 of ORDER BY clause is not in SELECT list, references column 'db213834xwp.talentum_sfposts.post_id' which is not in SELECT list; this is incompatible with DISTINCT]
SELECT DISTINCT forum_id, topic_id FROM talentum_sfposts WHERE post_status = 0 AND talentum_sfposts.forum_id IN (1,2) = 1 ORDER BY post_id DESC LIMIT 15;