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Further clarify why membership events are not to be transferred

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Travis Ralston 2019-02-10 19:54:20 -07:00
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6
specification/modules/room_upgrades.rst
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@ -61,7 +61,11 @@ When the client requests to upgrade a known room to a known version, the server:
* ``m.room.join_rules``
* ``m.room.power_levels``
Membership events should not be transferred to the new room.
Membership events should not be transferred to the new room due to technical limitations
of servers not being able to impersonate people from other homeservers. Additionally,
servers should not transfer state events which are sensitive to who sent them, such as
events outside of the Matrix namespace where clients may rely on the sender to match
certain criteria.
4. Moves any local aliases to the new room.
5. Sends a ``m.room.tombstone`` event to the old room to indicate that it is not intended