diff --git a/be/app/Http/Controllers/SubTaskController.php b/be/app/Http/Controllers/SubTaskController.php
index 2671b44..27f2d62 100644
--- a/be/app/Http/Controllers/SubTaskController.php
+++ b/be/app/Http/Controllers/SubTaskController.php
@@ -262,7 +262,8 @@ class SubTaskController extends Controller
             $subtask->syncTimesheets($data['data']['timesheets']);
 
         // syncnutie timeblocks
-        $subtask->syncTimeblocks($data['data']['timeblocks']);
+        if (isset($data['data']['timeblocks']))
+            $subtask->syncTimeblocks($data['data']['timeblocks']);
 
         return response()->json([
             'message' => 'Subtask updated successfully',