AF business class fares other than to or from CDG had their structure changed recently. It used to be ZLSXX (14 days advanced purchase, non ref, 70 EUR change fee), then D3FFXX was full flex for 125-135 EUR more per direction. Now there are I3FFXX for this 125-135 EUR fare difference, and D costs 50-60 EUR more than I. I have not seen O fares yet if not from/to CDG.
EDIT: just checked again, I found O fares on MAD CPH for example. 21 days advanced purchase and 50 EUR cheaper per direction than Z fares that are still what they used to be, 14 days advanced purchase. O fares can be combined with J C D Z I fares but Z fares cannot be combined with O fares. Most likely a mistake fare
So enjoy intra Europe flights at 100 EUR per segment with 250% earning... before FB becomes revenue based!