public function down(Schema $schema)
{
// this down() migration is autogenerated, please modify it to your needs
$this->abortIf($this->connection->getDatabasePlatform()->getName() != "mysql");
$this->addSql("DROP INDEX date_bundle ON score");
$this->addSql("ALTER TABLE score DROP hash");
$this->addSql("CREATE UNIQUE INDEX date_bundle ON score (date, bundle_id)");
}