It's migration in this mod:
{
"item":[
["dyworld-chitin", "chitin"],
["dyworld-crystal", "crystal"],
["dyworld-crystai", "crystai"],
["dyworld-obsidian", "obsidian"],
["dyworld-sand", "sand"],
["dyworld-frame", "frame"],
["dyworld-makeshift-battery", "makeshift-battery"],
["dyworld-makeshift-solar-cell", "makeshift-solar-cell"],
["dyworld-heater", "heater"],
["dyworld-blade", "blade"],
["dyworld-gearbox", "gearbox"],
["dyworld-processing-logic", "processing-logic"],
["dyworld-processing-advanced", "processing-advanced"],
["dyworld-glass", "glass"],
["dyworld-rotor", "rotor"],
["dyworld-stone-gear", "stone-gear"],
["dyworld-steel-gear", "steel-gear"],
["dyworld-solar-cell", "solar-cell"],
["dyworld-battery-pack", "battery-pack"],
["dyworld-steel-stick", "steel-stick"],
["dyworld-stone-stick", "stone-stick"],
["dyworld-binding-copper", "binding-copper"],
["dyworld-binding-iron", "binding-iron"],
["dyworld-binding-steel", "binding-steel"],
["dyworld-binding-chitin", "binding-chitin"],
["dyworld-logistic-unit", "logistic-unit"],
["dyworld-wood-stick", "wood-stick"],
["dyworld-resin", "resin"],
["dyworld-rubber", "rubber"],
["dyworld-controller", "controller"],
["dyworld-housing", "housing"],
["dyworld-intake", "intake"],
]
}