Commerce5 now includes a form in Counterpoint that identifies items with multiple barcodes per barcode ID.
Note - This form only needs to be used if you're planning to use Barcodes on your website. The most common use for barcodes online is for integrations to marketplaces like Ebay, Amazon, or Google Shopping.
Example Scenario: When there is more than 1 barcode with barcode type UPC for an item then the Commerce5 product upload will select the first UPC barcode for that item. This may not be the correct UPC that is needed to be uploaded to Magento for the Google Shopping Feed. This form has been included to make it easy to identify items in this situation so they can be cleaned up.
Commerce5 > Item Cleanup > View Items with Multiple Barcode Per Barcode ID
Example item with Duplicate UPC Barcodes