addSql('ALTER TABLE og_live CHANGE filename filename VARCHAR(255) NOT NULL'); $this->addSql('CREATE UNIQUE INDEX UNIQ_IDENTIFIER_FILENAME ON og_live (filename)'); } public function down(Schema $schema): void { // this down() migration is auto-generated, please modify it to your needs $this->addSql('DROP INDEX UNIQ_IDENTIFIER_FILENAME ON og_live'); $this->addSql('ALTER TABLE og_live CHANGE filename filename VARCHAR(255) DEFAULT NULL'); } }