@KatrinaF I don't know anything about licensing or business stuff. But if I had to guess, I'd say no.
Isn't licensing when someone has IP I like (such as a cartoon character or a sports team), & I want to make art based on their IP & sell it. Since I'm the one selling, I need the license / authorization of the IP owner, & I pay them to use it.
Since the owner of the character is the one who will be selling the items, this seems like a normal art job to me (such as a book, poster, magazine spot, etc.).
But as I said, I really don't know.
Congrats & Good Luck!