# TIER_NOT_EMPTY: A tier holding environments cannot be deleted

> The tier still has environments.

Sent by the management API (400). The page: https://coho-cms.com/errors/tier-not-empty/

## What to do

Delete or move its environments first.

## The response

```json
{
  "code": "TIER_NOT_EMPTY",
  "type": "https://coho-cms.com/errors/tier-not-empty",
  "title": "A tier holding environments cannot be deleted",
  "status": 400,
  "detail": "What went wrong in this request, in a sentence.",
  "instance": "/v1/projects/…"
}
```

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