# CANNOT_BRANCH_FROM: Cannot branch from this ref

> The ref cannot be branched from or tagged as asked: an environment that points at nothing, a tag branched from with `at`, a feature branch tagged, or a tag tagged again.

Sent by the management API (400). The page: https://coho-cms.com/errors/cannot-branch-from/

## What to do

Drop `at` when branching from a tag, tag a version branch, or point the environment at something first.

## The response

```json
{
  "code": "CANNOT_BRANCH_FROM",
  "type": "https://coho-cms.com/errors/cannot-branch-from",
  "title": "Cannot branch from this ref",
  "status": 400,
  "detail": "What went wrong in this request, in a sentence.",
  "instance": "/v1/projects/…"
}
```

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