Steps to reproduce: - put the currency of the bill to eur - change the partner with a partner with no purchase currency set Issue: The bill is re-set to usd Note: addendum to https://github.com/odoo/odoo/pull/116852 opw-3233527 closes odoo/odoo#119753 X-original-commit: 51ff9c6026b8f9079aba7c9e26891f62c782761d Signed-off-by: Cedric Snauwaert <csn@odoo.com> Signed-off-by: Yolann Sabaux (yosa) <yosa@odoo.com>