The Frequent Flyer Concierge team takes the hard work out of finding reward seat availability. Using their expert knowledge and specialised tools, they'll help you book a great trip that maximises the value for your points.
The Singapore Air website is rubbish - it might have saved it, it might not. Best bet may be to call them to check/add it. I had the same problem recently trying to add an AirNZ number to a booking.
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