Sale Order Line on change not updating product name

[john-herholz-dt]

I was investigating why the product name was not updated after the onchange event on sale order line product_id field.
The onchange was triggered but I found following problem that I cannot explain:

Module

connector-ecommerce

Describe the bug

Product name not updating via sale_order_onchange component

To Reproduce

14.0

Steps to reproduce the behavior:

1. Import sale order through connector framework (I used Magento Connector customized)

Expected behavior
Product name in the sale order line updating

Problem found here

 def get_new_values(self, record, on_change_result, model=None):
        vals = on_change_result.get("value", {})
        new_values = {}
        for fieldname, value in vals.items():
            if fieldname not in record:
                if model:
                    column = self.env[model]._fields[fieldname]
                    if column.type == "many2one":
                        value = value[0]  # many2one are tuple (id, name)
                new_values[fieldname] = value
        return new_values

file components/sale_order_onchange.py line 17:
if fieldname not in record

This prevents the update, because the name field is in the record.
Can it be the "not" is wrong here? Why is it there actually?