Thanks that help a lot.

A lot of other things happen after (many more error).

here the final code that make it work:

--entity
local turbin_MK2_entity = table.deepcopy(data.raw["generator"]["steam-turbine"])
turbin_MK2_entity.name = "turbin_MK2_entity"
turbin_MK2_entity.fluid_usage_per_tick ...

I am trying to make a mod and I keep getting this error:

Failed to load mods: Error while loading item prototype "Turbine-MK2" (item): Value must be a dictionary in property tree at ROOT.item.Turbine-MK2.icons.icon
Modifications: Turbine MK2


here my code:

--item.lua

local turbin_MK2_item ...