diff --git a/courses/views.py b/courses/views.py
index c40e3db..a475d67 100644
--- a/courses/views.py
+++ b/courses/views.py
@@ -24,6 +24,12 @@ class TreeView(APIView):
             return Response("Course doesn't exist", status=404)
 
         res = CourseTreeSerializer(course).data
+
+        if request.user.is_authenticated():
+            res['active_id'] = False
+            res['extra_privilege'] = []
+            return res
+
         try:
             res['active_id'] = Progress.objects.get(course=course, user=request.user).active_obj.id
         except Progress.DoesNotExist: