When destroying/ discarding an item (1 ITEM !! ) all of the items that are the same as the discarded one will get also discarded/ destroyed. I just discarded a helm now and it also discarded my equipped rare helm … 
When destroying/ discarding an item (1 ITEM !! ) all of the items that are the same as the discarded one will get also discarded/ destroyed. I just discarded a helm now and it also discarded my equipped rare helm …