Treat it like the 1* sword or club that most toons get.
It can be used, not upgraded or another weapon can replace it, but you will never see it in your inventory or armory
No everyone who got this character gets the weapon. It’s a unique mistake…I mean mechanic.
Take it as a blessing you can give him amy tough weapon. I’d rather that than waste endless resources making it what I want when I already have the weapon in my inventory that I’d like him to use.