diff --git a/be/app/Http/Controllers/SubTaskController.php b/be/app/Http/Controllers/SubTaskController.php
index c286bb8..2671b44 100644
--- a/be/app/Http/Controllers/SubTaskController.php
+++ b/be/app/Http/Controllers/SubTaskController.php
@@ -258,7 +258,8 @@ class SubTaskController extends Controller
         }
 
         // syncnutie vykazu
-        $subtask->syncTimesheets($data['data']['timesheets']);
+        if (isset($data['data']['timesheets']))
+            $subtask->syncTimesheets($data['data']['timesheets']);
 
         // syncnutie timeblocks
         $subtask->syncTimeblocks($data['data']['timeblocks']);