One to One Laravel relation - HasOne / BelongsTo - Owner <-> Car

2022_01_18_203224_create_owners_table.php

<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

class CreateOwnersTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('owners', function (Blueprint $table) {
            $table->id();
            $table->string('name');
            $table->unsignedBigInteger('car_id);
            $table->timestamps();
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::dropIfExists('owners');
    }
}

2022_01_18_203321_create_cars_table.php

<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

class CreateCarsTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('cars', function (Blueprint $table) {
            $table->id();
            $table->string('license_plate');
            $table->timestamps();
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::dropIfExists('cars');
    }
}

Car.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class Car extends Model
{
    use HasFactory;

    protected $fillable = [
        'licence_plate',
    ];
  
    public function owner()
    {
        return $this->belongsTo(Owner::class);
    }
}

Owner.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class Owner extends Model
{
    use HasFactory;

    protected $fillable = [
        'name',
    ];
  
    public function car()
    {
        return $this->hasOne(Car::class);
    }
}