Shopify Items where "Track quantity" is not checked translate to ERPNext items where "Maintain Stock" is checked.

[prices]

If Shopify is set up not to track the stock of an item, ERPNext should also not track the stock.

So if Shopify "Track quantity" is not checked then "Maintain Stock" should not be checked in ERPNext.

The frustration here is that the Shopify connector immediately puts stock transactions on an item. Therefore "Maintain Stock" can never be removed from the item.