---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/420019#article
headline: "420019: Knowledge base resource version conflict"
url: https://www.twilio.com/docs/api/errors/420019
inLanguage: en
dateModified: 2026-07-29T18:16:50.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 420019: Knowledge base resource version conflict

Log Type: TWILIO

Log Level: ERROR

## Description

Your request failed because the `If-Match` ETag you supplied doesn't match the current version of the knowledge base resource.

### Possible causes

* Another client updated the knowledge base after you fetched it but before you attempted to update it.

### Possible solutions

* Fetch the knowledge base again to obtain the latest ETag, then retry the update request.