[2023] ECO 10 Asset issues on existing local (solo) game

Migration of old worlds is only made for them to load, any incompatible data will be dropped and non-migratable things (like Stone Roads and Blocks that rotated) are kept as is. Proper migration is unfortunately not supported for major updates due to the massive amount of changes, we generally recommend to start a new game, it's also required for the new world generation.

You can spawn it via /give or use the /plant command to spawn them naturally. (Make sure to do a backup before you try development commands)