Has anyone seen this error message when viewing their reservation on continental.com? I bought a (refundable and changeable) round trip, and have so far flown half of it. I haven't made any changes so far, not even to the seat selection. Bringing up the details on the website, I see no changes, but there is this error message:

! A modification has been made to your itinerary. Please contact Reservations to have your ticket reissued.

The word “Reservations” is linked to the “Contact Reservations” page.

I haven't been contacted by email or phone.

I haven't been able to find any information about this message so far (just one context-free tweet).