Custom schema remember previous value

Hi:

I'm using a custom schema like this
```
new querymen.Schema({
store: {
type: RegExp,
paths: ['store'],
normalize: true,
},
});
```

If I made a request like this:
myurl.com/stores/?store=amazon, everithing is ok, but if I made a request after, but without any params: myurl.com/stores/, for some reason i keep getting this { store: /amazon/i } in my query

Is there a way to fix this behavior? or maybe I'm missing somethings.

best regards.