During February 2025, Zinefer focused on improving PostgreSQL enum handling in the sequelize/sequelize repository. He addressed a critical bug by refactoring the enum processing logic to correctly manage multiple distinct enum types during table creation and alteration. Using JavaScript and leveraging his expertise in backend development and database management, Zinefer ensured that enum definitions were preserved and accurately applied, reducing migration risks and enhancing schema reliability. He also expanded test coverage to prevent future regressions, demonstrating a thorough approach to quality assurance. This work improved migration workflows and increased developer confidence in maintaining consistent PostgreSQL schemas across environments.