Booked on the airfrance.us website. There is an advanced purchase requirement but the original flight is still more than a month off. I am just changing the date to August and the destination to SVO. The problem that each agent is having is that the CDG-SVO shows as oversold in their system. In fact, it is wide open. One agent tried to book the itinerary as a new one and had no problem with availability. It only occurs when trying to modify my original one. Problème technique.

In the US, I get a DL agent who even gets more confused. In France and Germany, they just can't figure out why the problem occurs. Should I try twitter?