Using Barcode Number as Primary Key in Laravel

I have problem to define the barcode number as the primary key at Item table. Previously I use the usual ID as the primary key.

Schema::create('items', function (Blueprint $table) {
    $table->increments('id');
    $table->string('name');            
    $table->integer('price');
}

Now, when I want to change the type of id to integer barcode number, it does not work.

Schema::create('items', function (Blueprint $table) {
    $table->integer('id', 15)->unsigned;
    $table->string('name');            
    $table->integer('price');
}

I got the error below after running php artisan migrate

 SQLSTATE[HY000]: General error: 1005 Can't create table `inventory`.`orders` (errno: 150 "Foreign 
 key constraint is incorrectly formed")

The Order table below has foreign key reference to Item table.

Schema::create('orders', function (Blueprint $table) {
    $table->increments('id');
    $table->integer('item_id')->unsigned();
    $table->integer('quantity');
    $table->timestamps();
    $table->foreign('item_id')->references('id')->on('items')->onDelete('cascade');
});

Answer

Try this one. hopefully it will work

 Schema::create('items', function (Blueprint $table) {
            $table->bigIncrements('id');

Schema::create('orders', function (Blueprint $table) {
        $table->increments('id');
        $table->integer('quantity');
        $table->timestamps();
        $table->unsignedBigInteger('item_id');
            $table->foreign('item_id')->references('id')->on('items')->onDelete('cascade');
    });