Worked on the Gozargah/Marzban repository to enhance data integrity in user lifecycle management by addressing a critical issue with expired account timestamps. Delivered a targeted database migration that corrected the last_status_change field for users marked as expired, ensuring accurate expiration times and consistent status history across both MySQL and SQLite environments. This backend development effort involved careful SQL scripting and migration planning to maintain traceability and reliability. The solution not only resolved the immediate bug but also established a foundation for future data correction migrations, reducing risk in expiration-based workflows and supporting more reliable downstream analytics and reporting processes.