# contact_exists

> The trip already has a booking contact.

**Contact already set** · HTTP 409

## What it means

The trip already has a booking contact.

## What to do

Change it with PATCH /trips/{tripId}/contact, or remove it first.

## Example

```json
{
  "type": "https://api.bymundi.com/problems/contact_exists",
  "title": "Contact already set",
  "status": 409,
  "detail": "The trip already has a booking contact.",
  "code": "contact_exists",
  "requestId": "req_…"
}
```

How to read any error: [Errors guide](https://api.bymundi.com/docs/guides/errors.md).