Duplicate CSV Column Data Upload Error

Duplicate CSV Column

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When you see this error: “Duplicate CSV Column: column name," your CSV contains the same column header more than once (for example: email,email). Message can’t tell which column to use, so the import is rejected.

Fix it

1. Open your CSV/spreadsheet and look at row 1 (the headers).

2. Find the header that appears twice.

If the two columns are truly duplicates (same values all the way down):

• Delete one of the duplicate columns, save, and re-import.

If the two columns are not identical (different values):

• Decide which field name is correct, rename the incorrect header, save, and re-import.

Quick check before re-upload: each header in row 1 should appear only once.