More than one partner function found for function type and transaction

Hi,

I am creating a quotation in a B2B webshop for a material that has a sales BOM. I get the error:

More than one partner function found for function type 0002 and transaction type for quotation.

What could be the reason for this error? There was only one partner function of type 0002 same quotation type

for a different material.

Regards,

meenakshi