I got one too for my December 27, 2017 Partial Canal Transit cruise.

I was really surprised because the only scheduled stop that may have had damage was Half Moon Cay. The other stops are Aruba, Curacao, Columbia, and Costa Rica.

I guess I got it because of the scheduled Half Moon Cay stop, but I can't see any reason the rest of the itinerary would be re-scheduled or changed.