Asset serialization rollback-safety boundaries after Unreal Engine version upgrades

Unreal Engine updates asset file formats and Asset Registry schemas when a project is opened in a newer engine version (e.g., transitioning from 5.3 to 5.4). Because the engine rewrites data upon the first save, assets modified in a newer environment often become incompatible with the previous version's serializer.

While FArchive custom versioning and AssetVersioning allow developers to handle migration logic forward, there is no documented native mechanism for forward-compatible, rollback-safe serialization. This is particularly problematic when working with World Partition or Derived Data Cache (DDC) structures, which undergo significant transformations that are not easily reverted by older engine binaries.

What are the recommended patterns for ensuring asset data remains loadable after a project has been saved in a newer engine version? Can custom versioning logic be used to implement a 'downgrade-path' for serialization without manual file-level backups?