# INVALID_PROMOTION_TARGET: Not a valid target for this tier

> The ref does not exist, or is not the kind the environment's tier serves: snapshot environments serve tags, and live ones follow branches.

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

## What to do

Promote a tag to a snapshot environment such as `prod`, a branch to a live one such as `dev`, and check the name.

## The response

```json
{
  "code": "INVALID_PROMOTION_TARGET",
  "type": "https://coho-cms.com/errors/invalid-promotion-target",
  "title": "Not a valid target for this tier",
  "status": 400,
  "detail": "What went wrong in this request, in a sentence.",
  "instance": "/v1/projects/…"
}
```

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