During July 2025, Hejufang developed a TTL-aware state migration capability for the HeapKeyedStateBackend in the apache/flink repository. This work focused on refactoring the migration pathway to handle changes in Time-To-Live (TTL) configurations during state restoration, ensuring that state migration behaves correctly when TTL is enabled or disabled across upgrades. By addressing the complexities of state management and data processing in Java, Hejufang reduced upgrade risks and improved forward compatibility for users modifying TTL settings. The depth of the solution is reflected in its traceability and auditable changes, providing a robust foundation for reliable state migration in Flink.