我尝试只使用up和down方法编写此迁移，但我得到此错误。
SQLSTATE[HY000]：一般错误：1553无法删除索引'transaction_id'：外键约束中需要

<?php

use \Test\Migrations\Migration;

class ModifyTableChargeback extends Migration

{
    public function up()
    {
        $table = $this->table('mod_chargeback');
        $table->addColumn('client_id', 'integer', ['after' => 'id'])
            ->addIndex('client_id')
            ->addColumn('invoice_id', 'integer', ['after' => 'client_id'])
            ->addIndex('invoice_id')
            ->addColumn('transaction_id', 'integer', ['after' => 'invoice_id'])
            ->addColumn('date_paid', 'datetime', ['null' => true, 'after' => 'result'])
            ->addColumn('date', 'date', ['null' => true, 'after' => 'date_paid'])
            ->addColumn('reason', 'string', ['null' => true, 'after' => 'date'])
            ->addColumn('issuer_message', 'string', ['null' => true, 'after' => 'reason'])
            ->addForeignKey('transaction_id', 'mod_transactions', 'id'
            ->update();
    }

    public function down()
    {
        $this->table('mod_chargeback')
            ->removeIndex('client_id')
            ->removeIndex('invoice_id')
            ->removeColumn('client_id')
            ->removeColumn('invoice_id')
            ->removeColumn('transaction_id')
            ->removeColumn('date_paid')
            ->removeColumn('date')
            ->removeColumn('reason')
            ->removeColumn('issuer_message')
            ->dropForeignKey('transaction_id')
            ->update();
    }
}

我尝试在$options参数中添加约束，但没有成功up方法正在工作，但在drop中它没有删除外键，我尝试重新排序drop orders，但也没有成功。