Hi Rosemary, that field is not from the standard Item Reference, as far as I know it comes from the Subscription Billing app. It points to the usage data supplier references, used when you bill usage data from a vendor like a cloud provider. For UPC codes you don't need it at all.
The error comes I think because it's an integer with a table relation. You left it empty, so the package puts 0 and then tries to validate 0 against that related table, and of course there is no such entry.
So nothing to fill there. Go to the package, open the fields of table 5777 and untick Include Field for it, or at least Validate Field. Then delete the error records, import the Excel again and apply.
One small thing, your reference numbers are mostly the same as the item no., is that really the UPC? Only the first line looks like a real barcode.
Glad to help - follow up if anything is unclear.
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Regards,
Grigorios Mavrogeorgis
Business Central Consultant & AL Developer
Work: Gmsoft Limited
Blog: insidebusinesscentral
LinkedIn: linkedin.com/in/gregorymavrogeorgis