{10} Closed Tickets by Project

OperationalError: ambiguous column name: description

SELECT COUNT(*) FROM (
SELECT DISTINCT
       p.value AS __color__,
       component AS __group__,
       t.id AS ticket, summary,
       t.type AS type, priority, owner, resolution, t.time AS created,
       t.changetime AS modified, description AS _description,
       reporter AS _reporter
  FROM ticket t
  LEFT JOIN enum p ON p.name = t.priority AND p.type = 'priority'
  LEFT JOIN ticket_change tc ON tc.ticket = t.id AND tc.author = %s
                                AND tc.field = 'comment'
  WHERE t.status == 'closed'
  ORDER BY 
           component,
           t.changetime DESC,
           CAST(p.value AS integer), 
           t.type, 
           t.time

) AS tab