Publishing to Ebay - Manufacturer Part Number

Morning all,

New Shopify user here so apologies if this is a pretty basic question.

I’m importing all my products to Shopify from a CSV file, then publishing from Shopify to Ebay. My CSV file is importing my products to Shopify perfectly but when trying to publish them to Ebay all are failing due to needing a ‘manufacturer part number’.

Now I know that before publishing to Ebay I could just bulk edit the part number field to ‘Does Not Apply’ and that would get the listings to publish but ideally I would actually like to publish with a manufacturer part number.

Is there any field I could fill in/add on the CSV file before importing to Shopify that would mean the ‘manufacturer part number’ field would already be populated before publishing to eBay.

Any help would be fantastic.

Many thanks

Mathew