Worked on improving metadata accuracy in the AliceO2Group/AliceO2 repository by addressing a defect in CTF compressed payload size reporting. Focused on enhancing data integrity, the developer corrected the calculation method to multiply the number of words by the word size, ensuring that compressed data sizes are reported accurately for downstream processing and auditing. This change, implemented in C++, leveraged expertise in compression algorithms, data formats, and metadata handling. The update did not introduce new user-facing features but prioritized reliability and precise defect resolution, contributing to more robust data governance and reducing the risk of misreported payloads in complex data workflows.