---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/420012#article
headline: "420012: Knowledge update validation failed"
url: https://www.twilio.com/docs/api/errors/420012
inLanguage: en
dateModified: 2026-04-01T17:30:49.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 420012: Knowledge update validation failed

Log Type: TWILIO

Log Level: ERROR

## Description

The update request for a knowledge item contains invalid or missing required fields.

### Possible causes

* Missing required fields (name or source)
* Name exceeds maximum length (30 characters)
* Description exceeds maximum length (1024 characters)
* Invalid source configuration

### Possible solutions

* Ensure all required fields are provided (name and source)
* Verify field lengths are within allowed limits
* Check that the source type and configuration are valid
* Review the API error details for specific validation failures