SKUID model doesn't trigger standard validations if no changes on model fields

I want to throw an standard salesforce validation error in the SKUID page when the user click on a SKUID button (not standard save button).

My problem is, if I haven’t change the value of a field on the field Editor area, the validation message won’t fire

If I change a field value to ‘Yes’ and then reset it to “-None-” (in this case all fields are picklists)
it throws the validation error message.

any solution for this?

Thanks in advance.