# ID_TAKEN: Id already taken

> The id you chose already names a type, trait, or asset, or an entry of another type on this branch. Two requests creating the same thing at once can also meet it.

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

## What to do

Leave the id out so Coho chooses one, or choose another. After a race, send the request again.

## The response

```json
{
  "code": "ID_TAKEN",
  "type": "https://coho-cms.com/errors/id-taken",
  "title": "Id already taken",
  "status": 400,
  "detail": "What went wrong in this request, in a sentence.",
  "instance": "/v1/projects/…"
}
```

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