This is a critical bugfix release of RobotPy, and this update is recommended for all RobotPy users.
NetworkTables didn’t properly handle sequence numbers, and would crash the server thread if too many values were sent over the network. This could lead to dangerous situations if test mode/LiveWindow were enabled.
See all changes on github. You can download the latest release from github, or use the installer to upgrade your current installation of RobotPy.