---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/420016#article
headline: "420016: Knowledge create validation failed"
url: https://www.twilio.com/docs/api/errors/420016
inLanguage: en
dateModified: 2026-04-01T17:30:49.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 420016: Knowledge create validation failed

Log Type: TWILIO

Log Level: ERROR

## Description

The request to create a knowledge item contains invalid or malformed data and was rejected.

### Possible causes

* Invalid JSON format in request body
* Missing required fields
* Invalid field values that don't match specific validation rules (e.g., name length, description length)

### Possible solutions

* Verify the request body is valid JSON
* Ensure all required fields are provided
* Check field lengths and formats meet API requirements
* Review the API error details for specific validation failures