I have a quick question on changing partner awards now that there is new pricing after the latest round of devaluations (apologies if it has already been asked and I have missed it):

I've got a booking on JAL thru Alaska that was booked before the most recent devaluation, and I am wondering if it's possible to move / change flights in the booking without incurring the additional mileage cost of the routing under the new pricing.

Thanks in advance!