(Laravel) Getting an incorrect datetime format error when running a migration

I'm simply trying to add a new column to an existing table. This is my migration:

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

class AddWarehouse extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::table('routes', function (Blueprint $table){
            $table->string('warehouse_address');
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::table('routes', function (Blueprint $table){
            $table->dropColumn(['warehouse_address']);
        });
    }
}

Running php artisan migrate caused the following errors:

 [Illuminate\Database\QueryException]
 SQLSTATE[22007]: Invalid datetime format: 1292 Incorrect datetime value: '0000-00-00 00:00:00' for column 'created_at' at row 1 (SQL: alter table `routes` add `warehouse_address` varchar(255) not null)



 [Doctrine\DBAL\Driver\PDOException]
 SQLSTATE[22007]: Invalid datetime format: 1292 Incorrect datetime value: '0000-00-00 00:00:00' for column 'created_at' at row 1



 [PDOException]
 SQLSTATE[22007]: Invalid datetime format: 1292 Incorrect datetime value: '0000-00-00 00:00:00' for column 'created_at' at row 1

The table contains columns 'created_at' and 'updated_at' which are already filled with correct values. How do I stop Schema from trying to insert a datetime into the 'created_at' column? I would rather leave it alone.

Executing the commands in MySql works perfectly fine.

via Chebli Mohamed