Error in mysql_query (select texts.post_subject, posts.post_id, post_time FROM phpbb_posts as posts join phpbb_posts_text as texts on texts.post_id=posts.post_id where posts.poster_id = (select user_id from phpbb_users as users where username='BassBird') order by posts.post_time desc limit 5): mysql_error: Subquery returns more than 1 row