I have a custom field defined like that:
```js
{
"quackgames:helpers": {
"name": "Helpers",
"type": "users",
"search": true
}
}
```
I try to make a custom query in manifest to see all task that don't have any "Helpers" associated to it. When I give no value, it don't filter anything, and there no "No one" option!
Is there a way to do this or something similar? Thanks.