This was in patch notes:
"Certain items have been made discardable.
In order to prevent the accidental loss of valuable items and gear, certain items have been made undiscardable. However, there have been a number of cases wherein players acquire multiple instances of these items, resulting in insufficient storage space. To address this issue, we have re-evaluated what items can and cannot be discarded."

One can only hope this means the extra af pieces some have acquired also. "X" fingers crossed!