Replicate (Duplicate) Eloquent Model With Relations

controller.php

<?php 
public function replicateWithRelations(QuestionCategory $questioncategory)
    {
        $newCategory = $questioncategory->replicate();
        $newCategory->name = "Kopyası: ".$questioncategory->name;
        $newCategory->push();

        $questioncategory->relations = [];

        //load relations on EXISTING MODEL
        $questioncategory->load('questions');
        //re-sync everything
        foreach ($questioncategory->getRelations() as $relationName => $values){
            $newCategory->{$relationName}()->sync($values);
        }

        return redirect()->route('neon.questioncategory.edit',$newCategory->id)->withSuccess("Kategori başarıyla kopyalandı");
    }
?>