Worked on the pentaho/pentaho-platform repository to deliver a targeted fix for data migration within the Quartz scheduler, focusing on improving the accuracy and reliability of scheduled job execution. Addressed a critical issue by mapping SCHED_TIME to FIRED_TIME in the QRTZ6_FIRED_TRIGGERS table when SCHED_TIME was undefined, and removed obsolete insertions into the QRTZ6_LOCKS table, which was absent from the target schema. This SQL scripting and database migration effort reduced upgrade risks and enhanced data integrity across migration paths. Demonstrated careful schema analysis and a methodical approach to aligning migration logic with the evolving requirements of the platform.