A Database Error Occurred

Error Number: 1054

Unknown column 'format.discussion' in 'where clause'

SELECT *, TIME_FORMAT(meetings.time, '%l:%i') as ftime, TIME_FORMAT(meetings.time, '%p') as ampm FROM meetings, format WHERE meetings.id = format.id AND meetings.active = 1 AND format.discussion IS NOT NULL ORDER BY day_num ASC, time ASC