SQLSTATE[HY000]: General error: 1215 - Even with 'InnoDB' and unsigned - laravel

Question

I'm trying to create a foreign key on the country_id field from domains table to the id field of countries. But when I do the migration: php artisan migrate:fresh.
Error message:
Illuminate\Database\QueryException : SQLSTATE[HY000]: General error: 1215 Cannot add foreign key constraint (SQL: alter table `domains` add constraint `domains_country_id_foreign` foreign key (`country_id`) references `countries` (`id`) on delete cascade)
Here is the domains migration file:
public function up()
{
Schema::create('domains', function (Blueprint $table) {
$table->increments('id');
$table->string('code');
$table->string('name');
$table->string('display_name');
$table->string('extension');
$table->string('google_analytics')->nullable();
$table->string('google_webmastertool')->nullable();
$table->string('google_maps')->nullable();
$table->integer('country_id')->unsigned();
$table->boolean('actif')->default(true);
$table->timestamps();
$table->engine = 'InnoDB';
});
Schema::table('domains', function (Blueprint $table) {
$table->foreign('country_id')->references('id')->on('countries')->onDelete('cascade');
});
}
And here is the countries migration file:
public function up()
{
Schema::create('countries', function (Blueprint $table) {
$table->increments('id');
$table->string('code');
$table->string('name');
$table->string('alpha2', 2);
$table->string('alpha3', 3);
$table->timestamps();
$table->engine = 'InnoDB';
});
}
As you can see the country_id field is unsigned and the table engine is InnoDB. I have already done other migrations with foreign key and they work fine, but this one, doesn't work :|
Thanks in advance for your help!

Answer 1

Solution from #Bogdan.
Change the order of the migration with the timestamp of the migration file.
You need to have the file with foreign key have a highter timestamp than the timestamp of the migration file where the primary key is located.