Laravel5 database table Creation

I followed @ JellyBool's video learning. Run the following command on the CMD command line. {Code ...} then, the following code {code...} is written in 2015_10_23_022143_create_articles_table.php ...} then run the command on CMD and an error is displayed, and the database does not display the error... I followed @ JellyBool's video learning.
Run the following command on the CMD command line.

php artisan make:migration create_articles_table --create=articles

Then, the following code is written in 2015_10_23_022143_create_articles_table.php:

public function up()    {        Schema::create('articles', function (Blueprint $table) {            $table->increments('id');            $table->string('title');            $table->text('content');            $table->timestamps('published_at');            $table->timestamps();        });    }

Then run the command on CMD and an error is displayed, which is not displayed in the database.articlesTable, where is the field already exists?

D:\laravel>php artisan migrate  [Illuminate\Database\QueryException]  SQLSTATE[42S21]: Column already exists: 1060 Duplicate column name 'created  _at' (SQL: create table `articles` (`id` int unsigned not null auto_increme  nt primary key, `title` varchar(255) not null, `content` text not null, `cr  eated_at` timestamp default 0 not null, `updated_at` timestamp default 0 no  t null, `created_at` timestamp default 0 not null, `updated_at` timestamp d  efault 0 not null) default character set utf8 collate utf8_unicode_ci)  [PDOException]  SQLSTATE[42S21]: Column already exists: 1060 Duplicate column name 'created  _at'

Reply content:

I followed @ JellyBool's video learning.
Run the following command on the CMD command line.

php artisan make:migration create_articles_table --create=articles

Then, the following code is written in 2015_10_23_022143_create_articles_table.php:

public function up()    {        Schema::create('articles', function (Blueprint $table) {            $table->increments('id');            $table->string('title');            $table->text('content');            $table->timestamps('published_at');            $table->timestamps();        });    }

Then run the command on CMD and an error is displayed, which is not displayed in the database.articlesTable, where is the field already exists?

D:\laravel>php artisan migrate  [Illuminate\Database\QueryException]  SQLSTATE[42S21]: Column already exists: 1060 Duplicate column name 'created  _at' (SQL: create table `articles` (`id` int unsigned not null auto_increme  nt primary key, `title` varchar(255) not null, `content` text not null, `cr  eated_at` timestamp default 0 not null, `updated_at` timestamp default 0 no  t null, `created_at` timestamp default 0 not null, `updated_at` timestamp d  efault 0 not null) default character set utf8 collate utf8_unicode_ci)  [PDOException]  SQLSTATE[42S21]: Column already exists: 1060 Duplicate column name 'created  _at'

Okay, I finally found out that it was my negligence.

$ Table-> timestamps ('hhed _ at'); change to $ table-> timestamp ('published _ ');

Timestamps () is different from timestamp. The former is a Laravel method used to manage creation and modification as the created_at and updated_at TIMESTAMP columns. This is the same as the method below, which leads to repeated fields.

Run the php artisan migrate command.
It fails. How can you execute it successfully?
[PDOException]
SQLSTATE [HY000] [1045] Access denied for user 'root' @ 'localhost' (using pas
Sword: YES)

The version 5.1. evn file I used is modified as follows:
DB_HOST = 127.0.0.1
DB_DATABASE = homestead
DB_USERNAME = root
DB_PASSWORD = secret
An error is returned when the above sentence is executed.