[FIX]purchase: A duplicated shipment is not associated with the original PO
[FIX]purchase: A duplicated shipment is not associated with the original PO

When duplicating a shipment, the shipment was not linked to the original PO.

opw:1854387

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo