Fix a bug introduced by #62032 and which causing the creation of unwanted additional SO line with multistep delivery. closes odoo/odoo#63057 X-original-commit: 076966fda2edcf1e5225c09b03c6700aa1b1f6e9 Signed-off-by: Arnold Moyaux <amoyaux@users.noreply.github.com> Signed-off-by: Steve Van Essche <svs-odoo@users.noreply.github.com>