---
title: "E15028 — WhatsAppTemplateParameterDuplicate"
description: "A variable name is used more than once in this language."
canonical: "https://bird.com/docs/api/errors/E15028"
---

# E15028 — WhatsAppTemplateParameterDuplicate

A variable name is used more than once in this language.

- **HTTP status**: `422`
- **Type**: `validation_error`
- **Name**: `WhatsAppTemplateParameterDuplicate`

## What to do

A name identifies one value the whole message fills in, so it can appear only once across a language's blocks. Rename one of them, or reuse the same value by giving the two places different names.

## Related

- [E15xxx — WhatsApp sending & delivery](/docs/api/errors/E15xxx): every code in this range
- [Errors](/docs/api/errors): the full wire contract, status mapping, and error catalog
- [Error handling](/docs/guides/errors): branching on `type` and `code`, validation details, and `vendor_code`

## Related resources

- [Should I use a Bird SDK or call the API directly?](/explained/platform/should-i-use-an-sdk-or-call-the-api-directly) (answer)
- [Build your first integration](/learn/paths/integration) (course)
- [Send your first email](/docs/get-started/send-your-first-email) (docs)

[Get an implementation brief](/learn/workspace?topic=api-basics)