multiple vendors with same product: sku/mpn

[grbfst]

We have several vendors that sell the same product at different price points. They use the same MPN/SKU.

When importing I get
"MPN 'CM14C-R-1' should have unique value."
or
Product with such SKU 'SN01C-N-23' already exist

I have set identifier on Sku (or MPN) Brand and Vendor (new entity)

Is there a way to "disable" the uniqueness of the SKU or MPN or have a unique on not only the SKU/MPN ?

[atrolex]

You need to use catalogs, SKU and MPN are unique within catalog.
You can also check whether these fields are marked as unique in administration/entities/products/fields.
You can also create your own fields and use them.