addSql('ALTER TABLE article ALTER id ADD GENERATED BY DEFAULT AS IDENTITY'); $this->addSql('DROP INDEX idx_event_kind'); } public function down(Schema $schema): void { // this down() migration is auto-generated, please modify it to your needs // $this->addSql('ALTER TABLE article ALTER id DROP IDENTITY'); $this->addSql('CREATE INDEX idx_event_kind ON event (kind)'); } }