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DupeFix Project

A mod to fix some Dupe Bugs
by focamacho
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1,908,430 downloads
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Updated Jun 30, 2026
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💎 DupeFix Project 💎 

 

DupeFix Project is a mod made for Minecraft 1.12.2 that fixes dupes in other mods.

The reason this mod exists is to fix as many dupes as possible so that modpacks and servers can take advantage of several mods without having to ban items from them.

Most mods here are either no longer updated, or no longer receive updates for Minecraft 1.12.2. So to keep them usable on modpacks and servers, this mod was created.

 

My game is crashing on startup, what do I do?

It could be an incompatibility of the Mixin version with other mods you have installed. Please try to install Mixin 0.7-0.8 Compatibility to prevent this from happening.

If the crash persists, please open an issue on GitHub.

 

Which dupes this mod fixes?

At the moment, this mod fixes the following Dupe Bugs:

 

Vanilla

Donkey Dupe Bug

Cow Dupe Bug

 

Blood Magic[CurseForge]

Sigil of Holding Dupe Bug

Sentient Armor Dupe Bug

 

Botania[CurseForge]

Virus Donkey Dupe Bug

 

Project Red: World[CurseForge]
Backpack Dupe Bug

 

Spice of Life[CurseForge]
Lunch Bag/Box Dupe Bug

 

Tinkers' Construct[CurseForge]
Tool Forge Dupe Bug

 

Thaumcraft[CurseForge]
Arcane Workbench Dupe Bug

Primordial Pearl Dupe Bug

Collector Infusion Enchantment Dupe Bug

Arcane Stone Dupe Bug

Multiplayer Arcane Workbench Dupe Bug

Magic Mirror Dupe Bug

Thaumcraft Entities Drops Dupe Bug

 

Thaumic Wonders[CurseForge]

Flying Carpet Dupe Bug

 

Tiny Progressions[CurseForge]
Big Pouch Dupe Bug

 

Mekanism[CurseForge]
Personal Chest Dupe Bug

Bin Dupe Bug

 

Nether Chest[CurseForge] 

Unstackable Items Dupe Bug

 

Industrial Foregoing[CurseForge] 

 Conveyor Belt Dupe Bug

 

Extra Utilities[CurseForge]

Machine Container Dupe Bug

 

Actually Additions[CurseForge]

Shulker Box Dupe Bug

 

The Farlanders[CurseForge]

Looter Thorns Enchantment Dupe Bug

 

Forestry[CurseForge]

Backpack Dupe Bug

 

Thermal Expansion[CurseForge]

Satchel Dupe Bug

Cache Dupe Bug

 

Arcane Archives[CurseForge]

Radiant Crafting Table Dupe Bug

Containers Dupe Bug

 

Tinkers' Complement[CurseForge]

Chisel Dupe Bug

 

Industrial Craft 2[CurseForge]

Industrial Crafter Dupe Bug

 

Quark[CurseForge]

Pickarang Dupe Bug

 

Iron Backpacks[CurseForge]

Recipe Dupe Bug

Swap Dupe Bug

 

Any problems or suggestions, create an issue on github

(https://github.com/Focamacho/DupeFix-Project/issues)

 

No files available for download.

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