Over speed is the aircraft flight condition when the airspeed at which the aircraft is travelling at exceeds a safe limitation. This is hazardous as it may damage the aircraft control surfaces or airframe integrity.
The use of third-party weather programs and systems (i.e.REX, Active Sky, etc.) can cause the aircraft to enter an un-warranted over speed state due to the way that each client updates the weather on the simulator.
For these reasons, staying longer than 30 seconds in a situation of overspeed in the air will bring disqualification.