.dupe is a chat command that allows the user to duplicate items in survival mode. It does this by corrupting the NBT data of a book and quill item so that the server fails to save the player's inventory.
.dupecommand. The player should be immediately kicked from the server, but this time the inventory is not saved.
This process can be repeated over and over again. The book and quill can just be left in the main hand slot, but the disconnecting and reconnecting step has to be done every time.
This item duplication glitch is known to work on vanilla Minecraft 1.16.4 and 1.16.5 servers. Bukkit-based servers seem to have patched this glitch.
|1.16.3||✔||✔||not tested||not tested||not tested|
When this glitch doesn't work on a server, the player will not be kicked and will instead receive a book titled “If you can see this, it didn't work”. When it doesn't work on Paper servers, the player is kicked with the message “Book too large!”.
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