The enum order has changed in the migration to the msgpack encoded
protocol.

See here for pre-msgpack order:

https://lab.nexedi.com/nexedi/neoppod/-/blob/6332112cb/neo/lib/protocol.py#L62-141

And here for post-msgpack order:

https://lab.nexedi.com/nexedi/neoppod/-/blob/9d0bf97a1327182ac29e95d65fd9e18742c43d1f/neo/lib/protocol.py#L102-181

As this order defines the encoding of the enum values, this needs to be
strictly followed to be compatible (to follow the protocol declaration).