---
title: "Error: validation_failed"
status: current
phase: 3
---

# `validation_failed`

**HTTP 422** · The data did not pass validation.

## Why it happens

A required field left empty when publishing, a number that is not a number, a duplicate slug, an invalid API ID, a reference to a type the field does not accept, or an image with no alt text.

## How to fix it

details.fields says which field and why. Fix it and retry; with dry_run=true you can test without saving.

## Example

```json
{
  "error": {
    "code": "validation_failed",
    "message": "The data did not pass validation.",
    "fix": "details.fields says which field and why. Fix it and retry; with dry_run=true you can test without saving.",
    "doc_url": "https://pluma.so/docs/errors/validation_failed"
  }
}
```