>>8087410unfortunately once a world starts suffering from chunk corruption it's usually a progressive issue that will gradually spread throughout the affected world, particularly in the areas that you regularly explore/build in, and eventually it can make the world unplayable.
even opening the world in its original version of the game and using a tool like worldedit with its terrain repair/regeneration options usually can't fix the problem because you generally have to be in/near the affected chunk to use those tools and just getting near to, or even worse entering, a corrupt chunk can/will often cause the game to immediately freeze and/or crash and leave you trapped in that corrupted chunk.
that said, if you do have access to worldedit you could instead try saving and moving each of your builds from the old world with corrupt chunks to a new clean world in a newer version of the game, just avoid copying any part of any of the corrupted chunks.
alternatively, the only other solution would be to revert back to an old saved copy of the world from before the point the corruption started (if you have such a save stashed away somewhere)
