通过更改某些列来复制Laravel中的Eloquent

Question

I'm using the replicate eloquent and it doesn't work on me. Replicate the row in database with changing some columns and it will save by clicking the button, can you please help me? My coding for controller

   public function newpayrolls(Request $request, $id){
    $newpay = Payroll::find($id);
    $newpay = $newpay->replicate();
    $newpay->id = $new_id;
    $newpay->data = $new_data;
    $newpay->save();
     return redirect("/payroll");

Coding for my blade.php

 <button class ="btn btn-primary btnd" type="submit" value="Submit">
      <span class="glyphicon glyphicon-arrow-left small"></span> Save as 
 new Payroll
    </button>
    </div>

And this is my route

Route::get('/viewpayrolls/{id}','PayrollController@newpayrolls');