Laravelで自動で作成される外部キー制約の名前が長すぎることが原因

解決するには？

外部キー制約に短い名前をつける

            $table->foreign('team_youtube_id', 'tedh_idfk_1')
                ->references('id')
                ->on('team_youtubes')
                ->onDelete('cascade');

これでいうと、「tedh_idfk_1」がそれにあたります。

具体例

<?php

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

class CreateTeamYoutubeDownloadHistories extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    const TABLE_NAME = "team_youtube_download_histories";

    public function up()
    {
        if (Schema::hasTable(self::TABLE_NAME)) {
            return;
        }
        Schema::create(self::TABLE_NAME, function (Blueprint $table) {
            $table->bigIncrements('id');
            $table->bigInteger('team_youtube_id')->unsigned();
            $table->timestamps();

            $table->foreign('team_youtube_id', 'tedh_idfk_1')
                ->references('id')
                ->on('team_youtubes')
                ->onDelete('cascade');
        });
    }

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