You don't state that your ticket is an award.
But even if this is a paid ticket in F fare bucket, the week-ahead F fare to LYS is likely to be much higher than what you paid. But you can ask the agent for a quote.
If you are on the 77W AF69, there is a good chance that it will become P4F2, but no certainty and the F availability might be picked up very very quickly as there is almost none on flights next week.
Stick with your ticket.