I want to resolve 'SQLSTATE [23000]: Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails~

Illuminate\Database\QueryException with message 'SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails (`laravel_local`.`user_gatya`, CONSTRAINT `user_gatya_users_id_foreign` FOREIGN KEY (`users_id`) REFERENCES `users` (`id`) ON DELETE CASCADE) (SQL: insert into `user_gatya` (`created_at`, `gatya_id`, `updated_at`, `users_id`) values(2021-05-06 17:01:28,1,2021-05-06 17:01:28,5)'

public function up()
    {
        Schema::create('users', function(Blueprint$table){
            $table->bigIncrements('id');
            $table->string('name');
            $table->string('email') ->unique();
            $table->timestamp('email_verified_at') ->nullable();
            $table->string('password');
            $table->rememberToken();
            $table->timestamps();
        });
    }

public function up()
    {
        Schema::create('gatya', function(Blueprint$table){
            $table->bigIncrements('id');
            $table->string('title');
            $table->string('description');
            $table->string ('rarity');
            $table->string('img');
            $table->timestamps();
        });
    }

<?php

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

class CreateUserGatyaTable extensions Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('user_gatya', function(Blueprint$table){
            $table->bigInteger('users_id')->nullable()->unsigned();
            $table->foreign('users_id')->references('id')->on('users')->onDelete('cascade');
            $table->bigInteger('gatya_id')->nullable()->unsigned();
            $table->foreign('gatya_id')->references('id')->on('gatya')->onDelete('cascade');
            $table->timestamps();
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::dropIfExists('user_gatya');
    }
}

<?php

namespace App;

use Illuminate\Contracts\Auth\MustVerifyEmail;
use Illuminate\Foundation\Auth\User as Authenticatable;
use Illuminate\Notifications\Notify;

class User extensions Authenticatable
{
    use Notify;

    /**
     * The attributes that are pass assignable.
     *
     * @var array
     */
    protected$fillable=[
        'name', 'email', 'password',
    ];

    /**
     * The attributes that should be hidden for arrays.
     *
     * @var array
     */
    protected $hidden = [
        'password', 'remember_token',
    ];

    /**
     * The attributes that should be cast to native types.
     *
     * @var array
     */
    protected$casts=[
        'email_verified_at' = > 'datetime',
    ];

    public function gatya(){
        return$this->belongsToMany('App\Gatya', 'user_gatya', 'gatya_id', 'users_id') ->withTimestamps();
    }
}

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsToMany;

class Gattya extensions Model
{
    //
    protected$table='gatya';
    
    protected$fillable=[
        'title',
        'description',
        'rarity',
        'img'
    ];

    public function cards(): BelongsToMany
    {
        return$this->belongsToMany('App\User', 'user_gatya', 'users_id', 'gatya_id', )->withTimestamps();
    }

    public function getCountCardsAttribute(): int
    {
        return$this->user_gatya->count();
    }

    public function isCardHave(?User$user):bool
    {
        return$user
        ? (bool)$this->cards->where('id', $user->id)->get()
        : false;
    }


}

public function draw()
    {
      $card=Gatya::inRandomOrder()->first();
      $card->cards()->attach(User::find(1));
      return$card;
    }