---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/17534#article
headline: "17534: Idempotency key payload mismatch"
url: https://www.twilio.com/docs/api/errors/17534
inLanguage: en
dateModified: 2026-07-24T16:44:52.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 17534: Idempotency key payload mismatch

Log Type: APPLICATION

Log Level: WARNING

## Description

A request with the same `Idempotency-Key` was previously submitted with a different payload. The original response is returned only when the payload matches exactly.

### Possible causes

* Reusing an idempotency key with a different request body.

### Possible solutions

* Use a new UUID for a different request, or submit the identical payload to retrieve the original response.