# SCHEMA_INVALID: Invalid type definition

> The content type's definition is not valid: a field of an unknown type, a rule that does not apply to it, or a missing required part. The detail says what.

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

## What to do

Correct the definition as the detail says.

## The response

```json
{
  "code": "SCHEMA_INVALID",
  "type": "https://coho-cms.com/errors/schema-invalid",
  "title": "Invalid type definition",
  "status": 400,
  "detail": "What went wrong in this request, in a sentence.",
  "instance": "/v1/projects/…"
}
```

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