Supplier not approved for part class

Have an error code that says:

“Supplier is not approved for Class F170” which is a class for fixed asset purchases.
I know how to get around the error by adding the supplier to the approved supplier on the part class, but we generally do not restrict suppliers to particular class codes.

It’s all or nothing really, what I mean by that is when you have 1 supplier on this approved supplier logic, then all suppliers who wish to deal with this part class need to be approved.
So, I think you have a supplier tied to F170. I’d query the AprvVend table and have a look