---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/520012#article
headline: "520012: Identifier merge conflict"
url: https://www.twilio.com/docs/api/errors/520012
inLanguage: en
dateModified: 2026-04-01T03:32:01.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 520012: Identifier merge conflict

Log Type: TWILIO

Log Level: ERROR

## Description

Identifier assignment failed due to an identity conflict, violating uniqueness constraints.

### Possible causes

* Identifier is currently exclusively linked to another profile within the workspace

### Possible solutions

* Query existing identifier ownership records
* Manually resolve the conflict or execute a profile merge operation before attempting to re-assign the identifier