Worked on the graphprotocol/graph-node repository to enhance data integrity in versioned data retrieval within the PostgreSQL store. Focused on backend development using Rust and SQL, the work addressed a critical bug by correcting the SQL join condition between current_version and pending_version tables. By updating the join to use the id column instead of the subgraph column, the solution improved the accuracy of queries across the s and v tables. The patch was isolated to the storage layer, ensuring maintainability and clarity for future development. This targeted fix supports more reliable version lookups for production dashboards and downstream consumers.