addSql(<<<'SQL' ALTER TABLE season DROP CONSTRAINT FK_F0E45BA96706D6B SQL); $this->addSql(<<<'SQL' ALTER TABLE season ADD CONSTRAINT FK_F0E45BA96706D6B FOREIGN KEY (active_quiz_id) REFERENCES quiz (id) ON DELETE SET NULL NOT DEFERRABLE INITIALLY IMMEDIATE SQL); } public function down(Schema $schema): void { $this->addSql(<<<'SQL' ALTER TABLE season DROP CONSTRAINT fk_f0e45ba96706d6b SQL); $this->addSql(<<<'SQL' ALTER TABLE season ADD CONSTRAINT fk_f0e45ba96706d6b FOREIGN KEY (active_quiz_id) REFERENCES quiz (id) NOT DEFERRABLE INITIALLY IMMEDIATE SQL); } }