Chunks are misplaced out of nowhere - Could use some assistance...

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Hi guys im on Java 1.21.1 ive been playing on my forever world for the past 2 months and i log in with my chicken farm all discombobulated and lava source being placed in two different areas. As you can see it looks like the two chunks were swapped. Im not much of a expert with this stuff i only know how to build stuff...Any help would be very helpful