I think Airbus would disagree with you there. It means the Autobrake function is lost. If there was a fault with BSCU 1 or 2 or Normal Brakes or Alternate brakes it would tell you. It used to be taught that this failure would come up if the Autobrake selector button was “stabbed” rather than selected in the approved Airbus fashion. Have seen it happen a couple of times but not for a while now.