diff --git a/Timeline/SingleTaskTaskLifeCycleEventTimelineProvider.php b/Timeline/SingleTaskTaskLifeCycleEventTimelineProvider.php
index 4f107f1cd..6e40cb4a3 100644
--- a/Timeline/SingleTaskTaskLifeCycleEventTimelineProvider.php
+++ b/Timeline/SingleTaskTaskLifeCycleEventTimelineProvider.php
@@ -97,15 +97,17 @@ class SingleTaskTaskLifeCycleEventTimelineProvider implements TimelineProviderIn
 
     public function getEntityTemplate($entity, $context, array $args)
     {
-        $workflow = $this->registry->get($entity->getTask(), $entity->getData['workflow']);
-        $transition = $this->getTransitionByName($entity->getTransition(), $workflow);
-
+        if (isset($entity->getData()['workflow'])) {
+            $workflow = $this->registry->get($entity->getTask(), $entity->getData()['workflow']);
+            $transition = $this->getTransitionByName($entity->getTransition(), $workflow);
+        }
+    
         return [
             'template' => 'ChillTaskBundle:Timeline:single_task_transition_task_context.html.twig',
             'template_data' => [
                 'task' => $args['task'],
                 'event' => $entity,
-                'transition' => $transition
+                'transition' => $transition ?? null
             ]
         ];
     }