json键以星号开头

I have print all my products in a json array. Everything looks good and working except that each key as an asterik in front of it (see pic)

Does anybody have already seen this? Look like i cannot access to the value and i guess is because of the asterisk.

Let's say i want to access my product id, what i tried is:

product.id // undefined

product["id"] //undefined

product["*id"] //undefined

As you can see my product id is not empty so i'm pretty sure is not undefined.

I'm wondering if is some kind of way BigCommerce API use to communicate me that those keys are not available for me to use? Maybe are just reference?

I'm thinking in this way because we create the same array for Categories and for Brands but we don't get the asterisk. Instead i see the same asterisk to the key *commerceAPI