System Error SQL ERROR Line 1232 courseMethods.php getRecentAttempts

Errors

SELECT * , COUNT(q.id) AS Attempts FROM et_question_attempt atm LEFT JOIN et_question q ON q.id = atm.atmqid JOIN et_exercise e ON e.id = q.eid JOIN et_course c ON c.id = e.cid WHERE a.atimestamp >= UNIX_TIMESTAMP() - 604800 AND a.auid = "1" AND a.adeleted != "1" GROUP BY q.eid ORDER BY q.eid

SQL Error

Unknown column 'a.atimestamp' in 'where clause'

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