During July 2025, Erdmann contributed to the SemanticMediaWiki/SemanticMediaWiki repository by delivering a targeted backend fix addressing a deprecation issue in the SQLStorage path. Focusing on PHP and SQL, Erdmann updated the handling of primary keys within the SQLStore’s replace method to align with changes in normalizeUpsertKeys, ensuring compatibility with newer PHP and database environments. This work maintained the stability and correctness of the data storage layer, reducing the risk of runtime errors during upgrades. Although the contribution was limited to a single bug fix, it demonstrated careful attention to compatibility and maintainability in backend development for evolving software ecosystems.