[MCPE-145776] "Old" worlds could not be opened

After I updated my game to 1.17.40, my "Old" (world type) world could not be opened anymore. I originally created the world over at 1.17.30, but now whenever I try to load it, I always get stuck at the "Generating Terrain" screen.

Related issues

duplicates

MCPE-120820 Stuck on "Generating world" screen when creating Old type world

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migrated 2021-10-22T20:05:44Z

[media]

migrated 2021-10-22T20:09:47Z

Were you inside the Nether on your last session with your old world?

[Mod] OcelotOnesie 2021-10-23T12:07:55Z

Thank you for your report!
We're tracking this issue in MCPE-120820, so this ticket is being resolved and linked as a duplicate.

If you would like to add a vote and any extra information to the main ticket it would be appreciated.

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migrated 2021-10-23T19:44:27Z

I've just created the world on the previous version after I learned about the "Old" worlds being removed in the latest beta. I just created it and quit afterwards. Then I updated my game and I couldn't open it anymore.