Does canceling a Dividend Miles credit card affect any already-made reservations?

Hi -

I've got a Dividend Miles credit card that's coming up on the 1 year anniversary, and I don't think I'm going to keep it.

My question: if I ticket a reservation using the 35,000 Dividend Miles that I received as the bonus for signing up for the credit card, is this ticket in any jeopardy once I cancel the card? I've heard that Barclay's might get huffy about this type of scenario and attempt to claw back bonus miles, but a ticketed reservation is out of their reach, correct?

Thanks for any insight...