diff --git a/aleksis/apps/chronos/preferences.py b/aleksis/apps/chronos/preferences.py
index e75062cc2209c6a2affddbf2f52a45aaebd0f0d2..d26653216f30acefac397ead20f97193546b0f0a 100644
--- a/aleksis/apps/chronos/preferences.py
+++ b/aleksis/apps/chronos/preferences.py
@@ -127,9 +127,6 @@ class GroupTypesTimetables(ModelMultipleChoicePreference):
     verbose_name = _("Group types to show in timetables")
     help_text = _("If you leave it empty, all groups will be shown.")
 
-    def get_queryset(self):
-        return GroupType.objects.managed_and_unmanaged()
-
 
 @site_preferences_registry.register
 class LessonEventFeedColor(StringPreference):