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download from reputable platforms like Modrinth or CurseForge.
Duplication (or "duping") mods are tools used to multiply items, often for resource management in single-player or for gaining an advantage on Anarchy servers. DupeMe! - Minecraft Mod - Modrinth DupeMod 1.3.jar
random Discord links or unverified YouTube "download" descriptions. Understanding Minecraft Duplication Mods DupeMod 1.3.jar