How to avoid GROUP_CONCAT() rows multiplying my SUM() - mysql

Question

So I have a query who retrieves support tickets and with GROUP_CONCAT() im retrieving each ticket statuses on one row, to proccess in PHP as an array.
My problem is that on the query I have a SUM() to get time expent on each ticket from his interventions but, for example, if GROUP_CONCAT() retrieves 12 statuses and the ticket summation is 2400 seconds, the final result of SUM() is 2400 x 12 = 28800.
Here is my query:
SELECT t.subject as theme, SUM(fd.duree) as time, t.datec, t.date_close, t.category_code as category, GROUP_CONCAT(DISTINCT IFNULL(tl.status, 0),'_',tl.datec ORDER BY tl.datec) as status
FROM llx_ticketsup as t
JOIN llx_societe as s on s.rowid = t.fk_soc
JOIN llx_user as u on u.rowid = t.fk_user_assign
JOIN llx_element_element as ee on ee.fk_source = t.rowid
JOIN llx_fichinter as f on f.rowid = ee.fk_target
JOIN llx_fichinterdet as fd on fd.fk_fichinter = f.rowid
JOIN llx_ticketsup_logs as tl on tl.fk_track_id = t.track_id
WHERE t.fk_statut = 8
AND t.fk_soc = 165
AND (STR_TO_DATE(t.date_close, '%Y-%m-%d') BETWEEN '2018-06-25' AND '2018-06-25 23:59:59')
GROUP BY t.rowid
Result:
It should have 2400 on time, but is multiplying by his 12 statuses.
If I group by statuses too, time is well as you can see, but I need only one row with ticket real time expent and his statuses concatenated.
My question is, how can avoid GROUP_CONCAT() rows not to multiplying my SUM() ?
*EDIT: I made it work by dividing SUM(fd.duree)/COUNT(DISTINCT tl.rowid). I know it's a weird fix but don't know how to do otherwise. If anybody has any suggestion would appreciate it. Thanks!

Answer 1

SELECT t.subject as theme,
SUM(fd.duree) as time,
t.datec, t.date_close,
t.category_code as category,
(SELECT GROUP_CONCAT(DISTINCT COALESCE(l.status, 0),'_',l.datec ORDER BY l.datec)
FROM llx_ticketsup_logs AS l WHERE fk_track_id = t.track_id) as status
FROM llx_ticketsup as t
JOIN llx_element_element as ee on ee.fk_source = t.rowid
JOIN llx_fichinter as f on f.rowid = ee.fk_target
JOIN llx_fichinterdet as fd on fd.fk_fichinter = f.rowid
WHERE t.fk_statut = 8
AND t.fk_soc = 165
AND (STR_TO_DATE(t.date_close, '%Y-%m-%d') BETWEEN '2018-06-25' AND '2018-06-25 23:59:59')
GROUP BY t.rowid