Hello all
Hoping that someone can point me in the right direction. I was a DL Platinum and now have zero status. When I booked an AF flight for this week in business class to Singapore, I had Platinum and was able to assign seats. I'm done with the DL program and want to credit the flights to Flying Blue where I have no status. If I change the FF number, do I risk the seats dropping out of the system? For some reason, the AF system is still seeing me as a DL Platinum.

Thanks!