Worked on the openreplay/openreplay repository to stabilize the Product Analytics migration by addressing a critical ClickHouse SQL syntax error that prevented the creation of product_analytics tables and disrupted analytics APIs. The solution involved removing a duplicate ORDER BY clause and correcting the clause sequence to comply with ClickHouse requirements, which enabled the successful creation of over 51 analytics tables. This fix eliminated Unknown table errors in filters and events APIs, restoring reliable data availability for analytics dashboards. Demonstrated strong skills in SQL, database management, and migration debugging, while deploying the solution through Git cherry-pick for traceability and rollback support.