Impacted versions:
Tested on 13.0 (docker:latest)

Steps to reproduce:
Create an inventory, import csv file, then process it.

Current behavior:
Unknown error during import: <class 'KeyError'>: 'product_id' at 147 different rows:

Expected behavior:
Import without errors.

It's my first inventory ever in odoo, so, maybe, I did something wrong.

I'm trying to import the inventory lines from a csv with External_ID and Counted Quantity (and other unnecessary columns that I'm not importing)