（php/laravel)seederでダミーデータ登録できない

前提・実現したいこと

artisanコマンドでシーディングを実行するとエラーになり、登録ができない。
エラーなくダミーデータの登録をしたい

行ったコマンド
[mac]$ pwd
/Users/*********/laravel-docker-workspace/my-laravel-app

[mac]$ docker-compose up -d

[mac]$ docker-compose exec app bash

[コンテナ]$ cd laravel-app

[コンテナ]$ php artisan make:seeder UsersTableSeeder

発生している問題・エラーメッセージ

 SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry 'admin@example.com' for key 'users_email_unique' (SQL: insert into `users` (`name`, `email`, `password`, `admin_flg`, `updated_at`, `created_at`) values (admin, admin@example.com, $2y$10$YhKPPqfuP1foz6BAtmTWqesJYPV31b1aaZQCGGqVlzzVPIFkex0dW, 1, 2021-02-27 09:13:22, 2021-02-27 09:13:22))

該当のソースコード

php
1my-laravel-app/database/seeds/DatabaseSeeder.php
2
3<?php
4
5use Illuminate\Database\Seeder;
6use App\User;
7
8class UsersTableSeeder extends Seeder
9{
10    /**
11     * Run the database seeds.
12     *
13     * @return void
14     */
15    public function run()
16    {
17        $users = [
18            [
19                'name'      => 'admin',
20                'email'     => 'admin@example.com',
21                'password'  => Hash::make('password'),
22                'admin_flg' => true,
23            ],
24            [
25                'name'      => 'test0001',
26                'email'     => 'test0001@example.com',
27                'password'  => Hash::make('password'),
28                'admin_flg' => false,
29            ],
30        ];
31        
32        // 登録
33        foreach ($users as $user) {
34            User::create($user);　←エラー指摘箇所
35        }
36    }
37}
38
39<?php
40
41use Illuminate\Database\Seeder;
42
43class DatabaseSeeder extends Seeder
44{
45    /**
46     * Seed the application's database.
47     *
48     * @return void
49     */
50    public function run()
51    {
52        $this->call(UsersTableSeeder::class);　←エラー指摘箇所
53    }
54}
55

php
1my-laravel-app/database/migrations/2021_02_26_141741_create_microposts_table.php
2
3<?php
4
5use Illuminate\Database\Migrations\Migration;
6use Illuminate\Database\Schema\Blueprint;
7use Illuminate\Support\Facades\Schema;
8
9class CreateMicropostsTable extends Migration
10{
11    /**
12     * Run the migrations.
13     *
14     * @return void
15     */
16    public function up()
17    {
18        Schema::create('microposts', function (Blueprint $table) {
19            $table->bigIncrements('id');
20            $table->unsignedBigInteger('user_id');
21            $table->foreign('user_id')->references('id')->on('users');
22            $table->text('content');
23            $table->timestamps();
24        });
25    }
26
27    /**
28     * Reverse the migrations.
29     *
30     * @return void
31     */
32    public function down()
33    {
34        Schema::dropIfExists('microposts');
35    }
36}
37

php
1my-laravel-app/database/migrations/2014_10_12_000000_create_users_table.php
2
3<?php
4
5use Illuminate\Database\Migrations\Migration;
6use Illuminate\Database\Schema\Blueprint;
7use Illuminate\Support\Facades\Schema;
8
9class CreateUsersTable extends Migration
10{
11    /**
12     * Run the migrations.
13     *
14     * @return void
15     */
16    public function up()
17    {
18        Schema::create('users', function (Blueprint $table) {
19            $table->bigIncrements('id');
20            $table->string('name');
21            $table->string('email')->unique();
22            $table->string('password');
23            $table->boolean('admin_flg')->default(false);
24            $table->timestamps();
25        });
26    }
27
28    /**
29     * Reverse the migrations.
30     *
31     * @return void
32     */
33    public function down()
34    {
35        Schema::dropIfExists('users');
36    }
37}
38