SQLSTATE[23000]: Integrity constraint violation: 19 FOREIGN KEY constraint failed

Salve galera, estou tendo esse erro quando clico no botão para excluir uma série, estava excluindo perfeitamente, mas após a implementação das temporadas e dos episódios no projeto consegui apagar umas 2 ou 3 séries e depois começou a aparecer esse erro...

Laravel v9

Migration series

<?php

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

return new class extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('series', function(Blueprint $table){
           $table->increments('id');
           $table -> string('nome');
        });
    }

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

Migration temporadas

<?php

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

return new class extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('temporadas', function (Blueprint $table) {
            $table->bigIncrements('id');

            $table->integer('numero');

            $table->integer('serie_id');
            $table->foreign('serie_id')->references('id')->on('series');
        });
    }

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

Migration episodios

<?php

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

return new class extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('episodios', function (Blueprint $table) {
            $table->bigIncrements('id');
            $table->integer('numero');
            $table->integer('temporada_id');

            $table->foreign('temporada_id')->references('id')->on('temporadas');
        });
    }

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

Obs:. o laravel criou os meus Models na pasta Providers

Model serie

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Serie extends Model
{
    public $timestamps = false;
    protected $fillable = ['nome'];

    public function temporadas()
    {
        return $this->hasMany(Temporada::class);
    }
}

Model temporada

<?php

namespace App;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class Temporada extends Model
{
    use HasFactory;

    protected $fillable = ['numero'];
    public $timestamps = false;

    public function episodios()
    {
        return $this->hasMany(Episodio::class);
    }

    public function serie()
    {
        return $this->belongsTo(Serie::class);
    }
}

Model episodio

<?php

namespace App;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class Episodio extends Model
{
    use HasFactory;

    protected $fillable = ['numero'];
    public $timestamps = false;

    public function temporada()
    {
        return $this->belongsTo(Temporada::class);
    }
}