Instead of hunting for a ghost dupe, you have two honorable paths:
If you want a balanced "duplication" experience, consider mods (via BepInEx): v rising item dupe
: In previous versions, players could duplicate items by dismantling a servant’s coffin if the servant had died, or by exploiting inventory states during server desyncs. These were patched out well before the 1.0 full release. Instead of hunting for a ghost dupe, you
: Always place your crafting stations on their specific matching floor types (e.g., Forge Floors for the Furnace). This reduces the cost of recipes, effectively giving you more items for fewer resources. v rising item dupe