# SY10091: Special hours can not be added without adding operational hours

Source: https://developer.synup.com/errors/sy10091

Documented under Locations.

```json
{
  "data": null,
  "errors": [
    {
      "message": "Special hours can not be added without adding operational hours",
      "context": {},
      "code": "SY10091"
    }
  ]
}
```