hello all,

i have a coulpe open segments from my CRWSTAR2, one of them is SIN-FRA originaly issued for use with SQ. now i cant find any seats under SQ flight # for the days i'd like to travel, but there is available seats on the same flight under LH codeshare #. does anyone know if i can just change to that or do i need to reissue the ticket and pay the change fee...

thanks in advance

sentom