{12} Active Tickets by Reporter

AmbiguousColumn: column reference "description" is ambiguous
LINE 7:    changetime AS _changetime, description AS _description,
                                      ^

SELECT COUNT(*) FROM (


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

) AS tab