Comcast Channel Changes

Hi. I'm central CT with a Roamio Pro using Comcast. In a couple of days Comcast will be moving most of their channels to new numbers.

I'm pessimistic that my Roamio will pick up the changes immediately. If it doesn't, should i do a repeat of guided setup? And could doing the guided setup require a re-pairing (or whatever it's called) of the cablecard?
Thanks.

Comcast Channel Changes