Ghosted item in inv.

[Scrubs]

Thought i was lucky..
I bought ninja headband from someone,gifted it to a mule, but stayed on the account not logging out.
A few mins. later I check inventory and the NINJA xD is still there onfused:
i try putting on but serial number doesn't exist, i refresh still there but can't equip, trade or sell.
The existing one is on my mule and can do everything, but i've never seen a ghosted item in inv.