---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/520056#article
headline: "520056: Data mapping already exists"
url: https://www.twilio.com/docs/api/errors/520056
inLanguage: en
dateModified: 2026-08-04T09:11:35.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 520056: Data mapping already exists

Log Type: TWILIO

Log Level: ERROR

## Description

A data mapping for the same dataset already exists on the target memory store.

### Possible causes

* Another data mapping on this memory store already maps the requested dataset. Data mappings are unique per store and dataset (1:1).

### Possible solutions

* Update the existing data mapping instead of creating a new one.
* Target a different dataset.