addSql(<<<'SQL' CREATE UNIQUE INDEX UNIQ_C8B28E445E237E064EC001D1 ON candidate (name, season_id) SQL); $this->addSql(<<<'SQL' CREATE UNIQUE INDEX UNIQ_A412FA925E237E064EC001D1 ON quiz (name, season_id) SQL); } public function down(Schema $schema): void { // this down() migration is auto-generated, please modify it to your needs $this->addSql(<<<'SQL' DROP INDEX UNIQ_A412FA925E237E064EC001D1 SQL); $this->addSql(<<<'SQL' DROP INDEX UNIQ_C8B28E445E237E064EC001D1 SQL); } }