Hello, I've been trying to modify my flights on a reservation in June on Delta, because of a recent scheduling change where I would now have a 30 minute connection. But when I click on "modify flights" I get this error message screenshotted below. I had to modify a flight on United last year (for a different reason) and I had no issues. So why can't I modify a flight on Delta? I tried modifying it yesterday and got this message, I tried again today and got the same thing.
