Steps to reproduce the bug: - Create a RFQ - Add a line with a product - Add a line with a note and save - Duplicate the RFQ Bug: A traceback was raised because the function _select_seller was called on a line with no product. opw:2085977 closes odoo/odoo#38921 X-original-commit: 4ffc517d6011c2443f78ba27a608d4ec3815e737 Signed-off-by: Simon Goffin (sig) <sig@openerp.com>