hello. i bought the ticket for the flight from subang airport to alor setar on 5th April 2021 through MAS application. the check in baggage allowed is only 25kg but i will be carrying check in baggage around 30kg. i tried to add the check in baggage kilo but it stated that it cant be modified. do i need to pay extra charge when i check in the baggage? . here i include my booking number and flight details. booking number: 6ZTKB7 flight number: MH 5368 from subang to alor setar-5/4/2021-1500hours.