diff --git a/htdocs/install/mysql/migration/repair.sql b/htdocs/install/mysql/migration/repair.sql
index dbb2ee0b7df..eab10d78383 100755
--- a/htdocs/install/mysql/migration/repair.sql
+++ b/htdocs/install/mysql/migration/repair.sql
@@ -236,3 +236,8 @@ delete from llx_commande_fournisseur_dispatch where fk_commandefourndet = 0 or f
 delete from llx_menu where menu_handler = 'smartphone';
 
 
+-- Detect bad consistency between duraction_effective of a task and sum of time of tasks
+-- select pt.rowid, pt.duration_effective, SUM(ptt.task_duration) as y from llx_projet_task as pt, llx_projet_task_time as ptt where ptt.fk_task = pt.rowid group by pt.rowid, pt.duration_effective having pt.duration_effective <> y;
+update llx_projet_task as pt set pt.duration_effective = (select SUM(ptt.task_duration) as y from llx_projet_task_time as ptt where ptt.fk_task = pt.rowid) where pt.duration_effective <> (select SUM(ptt.task_duration) as y from llx_projet_task_time as ptt where ptt.fk_task = pt.rowid)
+ 
+