View attachment 94472
Original booking - SIN - HKG in Mar 2018, I tried to change to Feb 2018, and got the message above...
Call them. I suspect the programming is picking up the ticket validity dates which is for 12 months from the original date of travel - and Feb 2018 is not within that period - I bet if you moved it one day later it would allow it to be moved free of charge. I hope they have a workaround for this over the phone.