//replace with parent form id
const parent_form_id = 23;
//replace with dropdown field id
const dropdown_field_id = 1;
// Replace with Nested Field ID (the id of the nested form on the parent form)
const nestedFieldID = 1;

let hasEntries = window[`GPNestedForms_${parent_form_id}_${nestedFieldID}`].entries.length;

if (hasEntries) {
	let entries = window[ `GPNestedForms_${parent_form_id}_${nestedFieldID}`].entries;
	$(`#input_${GFFORMID}_${dropdown_field_id} > option`).each(function () {
		let duplicate = false;
    	let option = this;
    	entries.forEach(function (entry) {
    		if ( entry[1].label === option.text ){
        		option.disabled = true;
        	}
		});
	});	
}