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Minecraft | Resetting Nether & End worlds when changing jar files: Explained

If you decide to switch to a different version of Minecraft, like Paper or Spigot, you might notice that your Nether and End worlds appear to have reset. This occurs because there is a disparity in how dimensions are stored between these JAR files. The same phenomenon occurs when transitioning from Paper or Spigot back to the vanilla version of Minecraft.

WorldNetherEnd
Vanilla/world/world/DIM-1/world/DIM1
Paper/Purpur/Spigot/world/world_nether/world_the_end

What do you need to do when switching JARS?​

  1. Ensure that the server is stopped.
  2. Connect to your server using SFTP.
tip

if you are unsure how to setup an FTP client you can follow this guide

  1. Navigate to the /world folder and make a copy of the DIM1 and DIM-1 folders, renaming them as world_nether and world_the_end, respectively.
  2. Move the /world/DIM-1 folder into the /world_nether folder so that it becomes /world_nether/DIM-1.
  3. Move the /world/DIM1 folder into the /world_the_end folder so that it becomes /world_the_end/DIM1.
  4. Start the server and verify that the changes were applied correctly. If any issues arise, you can restore the backup created in step 2 to revert to the previous state.
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