fetch data from one collection and set on form element and save on another collection

I created one form with 5 fields. For 2 fields I am fetching data from collection1(using wixData.query( " collection1 " ) ) and set fields value via query result. Another 3 fields need input fields added by the user. all 5 fields connected with the dataset2.

When I submit the form, 2 fields(fetch from collection1) of data not save on collection2.

$w.onReady( function () {
let cdata = wixWindow.lightbox.getContext();
$w( “#email” ).value = cdata.email;
$w( “#cnumber” ).value = cdata._owner
$w( “#vacancyID” ).value = cdata.vacancyId
$w( “#applicationID” ).value = cdata._id

wixData.query( "Candidates" ) 
.eq( "_owner" , cdata._owner) 
.find() 
.then((results) => { 
    $w( "#fname" ).value = results.items[ 0 ].firstNam; 
    $w( "#lname" ).value = results.items[ 0 ].lastName; 
}) 

});

I have the above code set on the ready function. I have form with a submit button connected to Collection2. but #fname and #lname fields do not save to the collection2 when I click on the submit button.

Any help, please?

https://russian-dima.wixsite.com/meinewebsite/dublicate-database

I have not facing duplicate item issue. i have different concern.