Laravel: Convert validation rules exception to another exception

Handler.php

<?php

namespace App\Exceptions;

use Illuminate\Database\Eloquent\ModelNotFoundException;
use Illuminate\Foundation\Exceptions\Handler as ExceptionHandler;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Http\Response;
use Illuminate\Validation\ValidationException;
use Throwable;

class Handler extends ExceptionHandler
{
    /**
     * Custom validation exception format
     * @param ValidationException $e
     * @param Request $request
     * @return JsonResponse|Response
     * @throws Throwable
     */
    protected function convertValidationExceptionToResponse(ValidationException $e, $request)
    {
        $this->convertValidationRules($e);
        return parent::convertValidationExceptionToResponse($e, $request);
    }

    /**
     * Convert validation rules
     * @param ValidationException $exception
     * @return void
     * @throws Throwable
     */
    public function convertValidationRules(ValidationException $exception)
    {
        collect($exception->validator->failed())->each(function ($failed, $key) {
            throw_if(collect($failed)->keys()->contains('Exists'), (new ModelNotFoundException())->setModel($key));
        });
    }
}