# TYPE_SLUG_FIXED: A type's slug cannot change

> A content type's slug is how its entries, generated code, and queries refer to it, so it never changes.

Sent by the management API (400). The page: https://coho-cms.com/errors/type-slug-fixed/

## What to do

Change the type's display name instead, or create a new type and move the entries.

## The response

```json
{
  "code": "TYPE_SLUG_FIXED",
  "type": "https://coho-cms.com/errors/type-slug-fixed",
  "title": "A type's slug cannot change",
  "status": 400,
  "detail": "What went wrong in this request, in a sentence.",
  "instance": "/v1/projects/…"
}
```

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