It looks like Kafka 3.0.0 deprecated the log.message.format.version field in broker configuration and message.fotmat.version in topic configuration. Once the inter.broker.protocol.version is set to 3.0 or newer, the field should be ignored. But it is heavily used in our upgrade docs => so we should update them to reflect this when upgrading to Kafka 3.0.0 or higher.

This is due to KIP-724