Preparations for the MainNet upgrade have begun following the successful deployment of Neo-CLI v3.1.0 on the N3 TestNet. On December 21, at 08:00 a.m. (UTC), the upgrade will take place. Users who run nodes on the Neo N3 MainNet are encouraged to upgrade as soon as possible. Because v3.1.0 is based on.NET 6.0, the most recent framework version in LTS.