# VALIDATION_FAILED: The document does not match its content type

> The entry's fields do not match its content type. The `errors` list gives each field and what is wrong with it.

Sent by the management API (400). The page: https://coho-cms.com/errors/validation-failed/

## What to do

Correct the fields the `errors` list names. The project's generated types catch most of these before you send.

## The response

```json
{
  "code": "VALIDATION_FAILED",
  "type": "https://coho-cms.com/errors/validation-failed",
  "title": "The document does not match its content type",
  "status": 400,
  "detail": "What went wrong in this request, in a sentence.",
  "instance": "/v1/projects/…"
}
```

Every error code: https://coho-cms.com/errors/