According to Foresight News, Sui Network has announced that its mainnet has been upgraded to version V1.9.1, and the Sui protocol has been updated to version 23. The key points of this upgrade include: enabling protocol configuration flags to use a reputation-based leader election algorithm to improve the fault tolerance of Narwhal, and setting a threshold for bad node staking on the mainnet; implementing structured output for Sui CLI commands 'sui client addresses' and 'sui client dynamic-field'; changing the default logging level of Sui CLI (client, Move, Keytool) from 'info' to 'error', allowing the logging level to be overridden by setting the RUST_LOG environment variable.