I have a *ONE* paper ticket with a flight I do not want to take. I'm planning on flying the exact itinerary on that ticket except for a single JFK-ORD segment which I need to skip. My current reservation does not contain this flight at all; only the paper ticket does.

I imagine I need to reissue the ticket to get rid of the extra flight, but I wanted to ask if someone has experience to the contrary.

Reissue in this case might be a hassle, as this is an AY-issued 11-month old paper ticket without a full tax breakdown that I'd need to reissue in the US.