Some of our ubl_bis3.xml invoices generated with Odoo 15 are rejected when we try to send them over an Peppol access point. We get the following error:
[BR-CL-23]-Unit code MUST be coded according to the UN/ECE Recommendation 20 with Rec 21 extension
that is due to a deprecated translation of the unit km to
<cbc:InvoicedQuantity unitCode="KTM"
When we change the deprecated unitCode manually in the xml file to "KMT" which is the official PEPPOL BIS Billing 3.0 unitCode the invoices are accepted.
When we try to update this translation rule in the code of the account_edi module this does not work. We changed it in the account_edi/models/uom.py the following line to the correct value:
'uom.product_uom_km': 'KMT',
but even after updating the account_edi module the generated xml files still keep the old "KTM" translation. Where could we adapt the code so that the correct translation is used?