message: Insert FLX subscription at the correct index
diff: @@ -191,7 +191,7 @@ void SubscriptionSet::clear()
  void SubscriptionSet::insert_sub_impl(Timestamp created_at, Timestamp updated_at, StringData name,
  StringData object_class_name, StringData query_str)
  {
  - auto new_sub = m_sub_list.create_and_insert_linked_object(m_sub_list.is_empty() ? 0 : m_sub_list.size() - 1);
  + auto new_sub = m_sub_list.create_and_insert_linked_object(m_sub_list.is_empty() ? 0 : m_sub_list.size());
  new_sub.set(m_mgr->m_sub_keys->created_at, created_at);
  new_sub.set(m_mgr->m_sub_keys->updated_at, updated_at);
  new_sub.set(m_mgr->m_sub_keys->name, name);
  