diff --git a/app/Http/Controllers/ScheduleController.php b/app/Http/Controllers/ScheduleController.php
index 61e0479..9ef017a 100644
--- a/app/Http/Controllers/ScheduleController.php
+++ b/app/Http/Controllers/ScheduleController.php
@@ -46,11 +46,15 @@ class ScheduleController extends Controller
         $prevDate = null;
         $prevSlot = null;
         foreach ($schedules as $schedule) {
-            if (isset($schedule->relatedModel->name)) {
-                $id_lie = array('label'=>$schedule->relatedModel->name, 'value'=>$schedule->id_lie);
-            } else {
-                $id_lie = array('label'=>'Ticket '.$schedule->id_lie, 'value'=>$schedule->id_lie);
+            $id_lie = null;
+            if(!is_null($schedule->model_lie)) {
+                if (isset($schedule->relatedModel->name)) {
+                    $id_lie = array('label'=>$schedule->relatedModel->name, 'value'=>$schedule->id_lie);
+                } else {
+                    $id_lie = array('label'=>'Ticket '.$schedule->id_lie, 'value'=>$schedule->id_lie);
+                }
             }
+
             if ($prevUserId != $schedule->user_id) {
                 //nouveau user
                 $arSchedules[$schedule->user_id] = array(