{13} All My Tickets Prioritized

AmbiguousColumn: column reference "description" is ambiguous
LINE 6:    changetime AS _changetime, description AS _description,
                                      ^

SELECT COUNT(*) FROM (
SELECT p.value AS __color__,
   t.status AS __group__,
   id AS ticket, summary, component, version, milestone,
   t.type AS type, severity, time AS created,
   changetime AS _changetime, description AS _description,
   reporter AS _reporter
  FROM ticket t
  LEFT JOIN enum p ON p.name = t.severity AND p.type = 'severity'
  WHERE owner = ''||%s||''
  ORDER BY status DESC, time, p.value, severity DESC, milestone, t.type
) AS tab