# TIER_ID_TAKEN: Tier id already in use

> The project already has a tier with that id.

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

## What to do

Choose another id.

## The response

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

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