A note at the bottom of FCOM DSC-22 30-90 P 5/12:
If the flight crew pushes and holds one instinctive disconnect pb for more than 15 s, the A/THR system is disconnected for the remainder of the flight. All A/ATHR functions including ALPHA FLOOR are lost, and can be recovered only at the next FMGC power-up (on-ground).
I understand that to mean that if you have inadvertent ALPHA FLOOR activation due to faulty AOA indications, you can stop it.