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Log in to your Pterodactyl Panel
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Select your Minecraft Server
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Stop the server completely
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Open the File Manager
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Create a backup before updating
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(Optional) Delete the existing
server.jar -
Go to the Startup tab
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Select the desired Minecraft Version / Jar Version from the dropdown
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Click Save Changes
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Go to Settings
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Click Reinstall Server
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After reinstall completes, start the server again
???? Note:
Reinstalling the server will re-download core server files. Your world and data remain safe, but always keep a backup.