[Illuminate\Database\QueryException] SQLSTATE[HY000]: General error: 1215 Cannot add foreign key constraint (SQL : alter table `article_article_type` add constraint `article_article_type_a rticle_id_foreign` foreign key (`article_id`) 有大用

Schema::create('article_article_type', function (Blueprint $table) {
    $table->integer('article_id')->unsigned();
    $table->integer('article_type_id')->unsigned();
    $table->foreign('article_id')->references('article_id')->on('articles')->onDelete('cascade');
    $table->foreign('article_type_id')->references('article_type_id')->on('article_types')->onDelete('cascade');
    $table->primary(['article_id','article_type_id']);
});