HubSpot Import Errors

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Workaround available Web Updated November 13, 2026Based on 3 user reportsHow we research

Quick answer

Most HubSpot import errors come from owner names, property mismatches, date or number formats and duplicates. Open the errors link on the column-mapping screen, use Edit column values to fix them in place, and re-import.

Most likely fix: Open the error details

How to fix it

Try these in order — the most common fix is first.

  1. 1. Open the error details

    1. On the Map columns screen, hover the row and click the errors link
    2. See affected column and rows
    3. Use Edit column values to correct a value; it applies to all matching rows, even past row 1,000
    Did this fix it?
  2. 2. Fix owner and property errors

    1. Could not find owner: use the full name or email as in HubSpot, or add/reactivate the user
    2. Multiple owners found: use the owner's email
    3. Property definition not found: map to an existing property, create one while mapping, or skip the column
    4. Invalid enumeration option: match the label or internal value, or add a custom option
    Did this fix it?
  3. 3. Fix format errors

    1. Could not parse date: check the date format dropdown (day/month order)
    2. Could not parse number: strip currency symbols or text
    3. Row data too large: shorten cells below 1 MB
    4. Save as .csv, .xls or .xlsx with a single sheet and a header on every column
    Did this fix it?
  4. 4. Fix duplicate and association errors

    1. Duplicate unique value: remove duplicates or choose a different Property to use to find existing objects
    2. Multiple companies with this domain: merge duplicates or import by Record ID
    3. Association errors: add a valid unique key such as Email, Company domain name or Record ID
    Did this fix it?
  5. 5. Unknown error

    1. Try another browser or clear the cache
    2. Confirm the file meets requirements
    3. If it persists, collect a HAR file and contact Support
    Did this fix it?

Symptoms

The import fails or skips rows with messages such as 'Could not find owner', 'Property definition not found' or 'Could not parse date'.

Why it happens

  • Owner name or email doesn't match an active user
  • Column header doesn't match a property
  • Dropdown values don't match an option
  • Date or number format differs from the selected format
  • Duplicate unique values or several companies with one domain
  • File has multiple sheets, blank headers or cells over 1 MB

This guide also covers

  • hubspot import error
  • hubspot could not find owner
  • hubspot import contacts failed
  • hubspot import property definition not found

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