Fixture
name,price,price
Blue Shirt,19.99,USD
Red Shirt,24.50,USDWhy this is structurally risky
The table has three values per row, so column count alone looks healthy. The problem is the header: both the second and third columns are named price. A destination that maps values by header name cannot reliably distinguish a numeric price from the currency text in this fixture.
Why automatic renaming would be guessing
Renaming the third column to currency seems reasonable to a person reading these two rows, but the CSV file itself does not define that meaning. Another dataset could use the second price as wholesale price, compare-at price, tax-inclusive price, or something else.
The checker should report the repeated header name.
Find the real field names in the exporting system or import template.
Use the exact destination field name rather than an inferred label.
Confirm every non-empty header is unique.