# package_in_use

> Lines still belong to this package.

**Package in use** · HTTP 422

## What it means

Lines still belong to this package.

## What to do

Remove its lines first.

## Example

```json
{
  "type": "https://api.bymundi.com/problems/package_in_use",
  "title": "Package in use",
  "status": 422,
  "detail": "Lines still belong to this package.",
  "code": "package_in_use",
  "requestId": "req_…"
}
```

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