Worked on the dotnet/efcore repository to resolve a complex insert-order bug affecting Table-Per-Concrete (TPC) inheritance scenarios with abstract principal types and JSON mappings. Addressed issues with foreign key processing that could compromise data consistency by implementing guard logic and refining edge-processing to ensure correct dependency registration and command scheduling. Enhanced the system’s handling of JSON-mapped entities to prevent cyclical dependencies and double-processing of foreign keys. The solution involved updates to dependency creation logic and improved stability for TPC scenarios. Utilized C#, Entity Framework, and database management skills to deliver a robust fix that improved data integrity and operational reliability.