the world completly changed after download

a world that was generated in 1.17 was converted into 1.18 was completly changed after download onto a different pc, all the entities stayed in the same locations, the inventory stayed the same

world download link:
https://drive.google.com/drive/folders/1MSjXPskiifpsaYrBXvhVtKUvCBG087La?usp=sharing