How to handle require types when user deletes input

[jack-allocate]

I've made a set of component wrappers for useForm, defineField, etc.

I have a schema like:

const schema = v.object({
  user: v.object(
    {
      age: v.pipe(v.number(), v.minValue(21)),
    }
  ),
})

The number input component sets the input value to undefined when the input is emptied. This means that the form value is now:

{
  user: {
     age: undefined
  }
}

The problem here is now it triggers an undesirable error "Invalid type: Expected number but received undefined".

The obvious fix to me is to delete the age key entirely instead of setting it to undefined, which would then trigger the required validation. I haven't found any way of doing this in the docs/existing issues.