Field help (BPSNUMPQH) 

Supplier code. From this field, several possibilities are offered to the user.
Indeed, it is possible to directly enter a supplier number which existence is controlled in the Supplier file (that must be active) or use the contextual button to:

It is also possible to select a supplier via option Supplier of the product, obtained via the contextual menu associated with the product by right click.

A warning message is displayed when the supplier is in dispute.
SEEINFO To delete a supplier from the list, it is necessary to either delete the line or uncheck the supplier in the quick select list Supplier selection.
When modifying the supplier on a purchase request line, the discounts and prices recalculation is suggested.