Notice that currently updating on loots are work on data.lua. If we rename it to data-updates.lua then all biters added in first round loading (data.lua) would be included. Otherwise some biters may be forgotten due to random loading order.

solved this problem through optional dependencies

data-updates.lua might be more adaptive so developers don't need to consider all newly added unit prototypes -- actually I find this problem when working with a mod I newly written ;)

I found that i made a mistake about loading mechanism. Prototype related luas that add contents should be put in data.lua, and those who modify contents should be in data-updates.lua, so they can work better with other mods that make thorough changes.

e.g. -- data.lua
require("prototypes.item.alien-module")
require("prototypes.item-group.item-groups-module")
require("prototypes.recipe.alien-module")

-- data-updates.lua
others