Ошибка в запросе БД

Ошибка в запросе БД:
Unknown column 'i.user_id' in 'where clause'
 
SELECT i.*, ch.slug as channel_slug, ch.title as channel_title, m.id as mid, m.slug as mslug, m.tumb_path, m.title as mtitle
FROM tpo_video_playlists i
LEFT JOIN tpo_con_channels as ch ON i.channel_id = ch.id
LEFT JOIN tpo_con_video as m ON i.first_movie_id = m.id
WHERE (i.user_id = '2') AND (i.is_access_by_link IS NULL)
ORDER BY i.date_update desc
LIMIT 10