Formatter error: The 'Line-item(s) Group Name' field should only contain text or single values

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Updated at August 20th, 2025

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Symptoms Causes How to fix it

Symptoms

When using Formatter by Zapier’s Utilities action with the transform Line Itemizer (Create/Append/Prepend) in your Zaps, you see the error message “The 'Line-item(s) Group Name' field should only contain text or single values". You’ll see this error when testing your Zap step or in the details of a Zap run in your Zap history.

Causes

This happens when the mapped field used in the Line-item(s) Group Name field contains line items. This field can only support one name for a group.

How to fix it

To fix this:

Go to your affected Zap and remove the mapped field containing the line items.
In the Line-item(s) Group Name field, enter a static value or add a mapped field that does not contain line items.
- If you want to transform the previously mapped field, you can convert line items into text strings.

Formatter error: The 'Line-item(s) Group Name' field should only contain text or single values

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Symptoms

Causes

How to fix it

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