Hi. I was starting to look into the different travel pass options in order to figure out which was the best option for my trip. However, when it came to the Bernina Express, there was only 2 tickets left for the 8am train on my date of travel. So of course I booked them immediately.
When I made the reservation, it asked me which travel pass I had; I selected the STP pass (as opposed to the STP flex pass). My question is this: if I purchase the STP flex pass, will it invalidate my reservation?