Hasaan Samseer

I got an Aqua 2015 (on 53000 driven) Pre-buy checked from Carchecks @kohuwala .. and the report was 98.5% ( GREEN). However they have mentioned that car Hybrid system is over heating and the inverter coolant level is also law.It indicated 40 degrees where it should be 5.(i have attached a copy of that report below) They recommended to have the hybrid system serviced. Is it a common minor issue or a greater fault which i shouldn't buy the car? Hope you guys can help me out..