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Magento 2 error when attempting to export pricing to customer groups

Problem: Error "We found a duplicate website, tier price, customer group and quantity".

Solution: Check Pricing Quantity, Pricing Price, and Pricing Level to be sure a category column was not added twice.  

Source Code Message
com.au 400 '{"message": "We found a duplicate website, tier price, customer group and quantity:"}'
In this example, the duplication is happening because the price was added twice (in both the column for Qty 0 and Qty 1). In item export processing, populate price in either qty0 or qty1, not both.

item_setup.png