# no_free_slot

HTTP 403 · Projects and domains (SPEC §5, §5.1, §16, §19.2)

There's no free active or parked slot to restore this project into. Park, archive or delete another project, or upgrade.

## Does retrying help?

Not until something else changes. The message says what: a plan, an add-on, a setting or a role. The same request then works.

## Already on the largest plan?

Studio is the largest plan. On Studio, use the message's other options, or email support@flatstack.dev and say what you need more of.

## The response

Every Flatstack error has this shape. `details`, when present, says more about this case.

```json
{
  "error": {
    "code": "no_free_slot",
    "message": "There's no free active or parked slot to restore this project into. Park, archive or delete another project, or upgrade.",
    "docsUrl": "https://flatstack.dev/docs/errors/no_free_slot"
  }
}
```

[All error codes](/docs/errors)