How to clean the dropdown local storage?

[PasHdez]

Hello, I'm trying to implement this component in one App, but I'm having a problem when I update the data.
I'm using two dropdowns the first one is a SelectList and the second one is a MultipleSelectList.

When the user selects a value in the first element the second element is populated through an API call, this is working well, the issue happens when the user selects data from the second element and then changes the selected option in the first element.

When this happens the information of the second dropdown is updated, but the selected data aren't cleared even if they don't appear in the newly populated data.

So, my question is, there is a way to programmatically clear the selected data in the MultiSelectList?