---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/520057#article
headline: "520057: Invalid suggested mapping identifier"
url: https://www.twilio.com/docs/api/errors/520057
inLanguage: en
dateModified: 2026-08-03T14:34:41.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 520057: Invalid suggested mapping identifier

Log Type: TWILIO

Log Level: ERROR

## Description

The supplied suggestion ID is not a valid suggested mapping identifier.

### Possible causes

* The suggestion ID is not a well-formed TTID.
* The TTID belongs to a different domain or resource type.

### Possible solutions

* Use the identifier returned by the create-suggestion request.