# WEBHOOK_HEADER_RESERVED: The header is Coho's to set

> The webhook sets a header that Coho sets on every delivery, such as the signature.

Sent by the management API (400). The page: https://coho-cms.com/errors/webhook-header-reserved/

## What to do

Remove that header from the webhook.

## The response

```json
{
  "code": "WEBHOOK_HEADER_RESERVED",
  "type": "https://coho-cms.com/errors/webhook-header-reserved",
  "title": "The header is Coho's to set",
  "status": 400,
  "detail": "What went wrong in this request, in a sentence.",
  "instance": "/v1/projects/…"
}
```

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