During May 2025, Chris focused on stabilizing SQL Server migrations in the hapifhir/hapi-fhir repository by addressing a multipart primary key issue in the database migrator. He refined the DropPrimaryKeyTask to correctly identify and handle multipart primary keys, ensuring alignment with SQL Server schema data. Using Java and SQL, Chris implemented a targeted fix and introduced an integration test, testDropAndAddPrimaryKeyTest, to validate the drop-and-readd behavior for primary keys. This work improved migration reliability and reduced upgrade risk for SQL Server deployments, demonstrating depth in database migration, integration testing, and schema management within a complex production environment.