list field url change

[ooo4321]

i have this simple list field in a form:

"somefieldinaform": {
type: 'list',
label: 'something',
options: {
url: https://api.something,
minLength: 0,
}
},

i added an onchange method to the form and this code :

let field = this.get('somefieldinaform');
field .options.url = 'https://something.else';
this.refresh();

The problem is that the field does not register the change i think i need to reload the field somehow after the change, what is the correct way to reload the field after url change ?