item will dissapear after a while (like ~48-72 h of online time)
My prophet had it 3 times after a bot session so i rerolled prophet and used my old one 2 buff.
Now my new prophet is 67 and my old is 73 and no of them has the item anymore :D
i had a prophet having the item 19998 3 times i just used him for buffing my reroll prophet but after a while the items dissapeared.
also the item on ground is 19999 so set up dont pick up 19999, then everything is fine.