According to Neo's official Medium, Neo-CLI v3.6.2 was released on November 17th and will be deployed to the T5 test network on November 21st, and to the main network on December 4th. This version includes improvements and optimizations such as adding a new system call "CurrentSigners" to get the current transaction signers, adding a new function "StrLen" to the native StdLib contract name to get the length of the string in the smart contract, and adding a cancel command in neo-cli and rpc for transactions with the "conflict" attribute to cancel transactions that have not yet been added to the chain.

This upgrade involves changes to native contracts and virtual machines. It is important to resynchronize data during the upgrade. Do not use the old version of the config.json configuration file.