Fix auth rules to allow first PL event
@@ -564,7 +564,9 @@ the state of the room.
#. If type is ``m.room.power_levels``:
- a. For each of the keys ``users_default``, ``events_default``,
+ a. If no previous ``m.room.power_levels`` event exist, allow.
+
+ #. For each of the keys ``users_default``, ``events_default``,
``state_default``, ``ban``, ``redact``, ``kick``, ``invite``, as well as
each entry being changed under the ``events`` or ``users`` keys:
