{10} Open tickets sorted by milestone, priority, time, severity, type

OperationalError: ambiguous column name: description

SELECT COUNT(*) FROM (
SELECT p.value AS __color__,
   id AS ticket, summary, component, version, milestone AS __group__, priority, severity, t.type AS type, 
   owner,
   reporter,
   status,
   time AS created,
   changetime AS _changetime, description AS _description
  FROM ticket t
  LEFT JOIN enum p ON p.name = t.priority AND p.type = 'priority'
  LEFT JOIN enum q ON q.name = t.severity and q.type = 'severity'
  LEFT JOIN enum r ON r.name = t.type and r.type = 'ticket_type'
  WHERE status <> 'closed'
  ORDER BY milestone, CAST(p.value AS int), time, CAST(q.value AS int), CAST(r.value AS int)
) AS tab