April 2025 monthly summary: Delivered targeted reliability and data-integrity improvements across two repositories. Key outputs: opencast/opencast: corrected a documentation typo in admin config comments to improve readability and reduce configuration errors (commit d80a9da5c21621c6ae984365950eaee68e4ece3e). ILIAS-eLearning/ILIAS: added a Release-9 data migration to fix ecs_course_assignments by joining with ecs_import, and refined parallel group data processing to correctly handle null cms_sub_id, enhancing robustness. These changes reduce operator confusion, strengthen data integrity, and prepare the platform for a stable Release-9 upgrade. Technologies demonstrated include documentation hygiene, data migrations, SQL joins, null handling, and parallel processing patterns. Business value: clearer configuration, fewer remediation efforts, and a smoother upgrade path.