@@ -2112,7 +2112,7 @@ class SessionManager
if ($nb_affected > 0) {
// Update number of courses in the session
- $sql = "UPDATE $tbl_session SET nbr_courses= nbr_courses + $nb_affected WHERE id='$session_id' ";
+ $sql = "UPDATE $tbl_session SET nbr_courses= nbr_courses - $nb_affected WHERE id='$session_id' ";
Database::query($sql);
return true;
} else {