Worked on the SemanticMediaWiki repository to address cross-version database compatibility in the SMW Export Controller. Focused on backend development and database management using PHP, the work involved replacing the deprecated wfGetDB() function with a static getDBHandle() method. This update leveraged MediaWikiServices to obtain replica database handles for newer MediaWiki versions, while providing a fallback to the DB_REPLICA connection for older versions. The approach ensured reliable read access and reduced runtime database errors during exports, improving stability in multi-version deployments. The solution emphasized maintainability by removing deprecated API paths and implementing robust, service-based database access for exports.