The problem was solved. It was necessary to specify the prototypes from the very first, vanilla, belt, to the very last one in the chain.
data.raw["transport-belt"]["transport-belt"].se_allow_in_space = true
data.raw["transport-belt"]["fast-transport-belt"].se_allow_in_space = true
data.raw ...

Hello. I have a problem. When trying to integrate transport belts from the UltimateBeltsSpaceAge mod with the SE mod, I get the error:
Error while running setup for entity prototype "ultra-express-belt" (transport-belt): next_upgrade target (extreme-express-belt) must have the same collision mask ...

Yes. You are right. data updates needed. I have question for the future. Can i change loadorder mod? Or tell me please where i can read about this. Thank you very much Stringweasel

i run you code, log

i add recipe category for check running my addon and it`s working, but se_allow_in_space = true not working.

if data.raw["assembling-machine"]["mega-furnace"] then
data.raw["assembling-machine"]["mega-furnace"].se_allow_in_space = true,
table.insert(data.raw['assembling-machine']['mega-furnace ...

please tell me where i see it, in game or log files?

screenshot assembling machine

Or maybe "mega-furnace" is not the correct name for the prototype. You can check the prototype name and type by selecting the entity in-game and pressing SHIFT + CTRL + F to open the prototype explorer. It has rows for those two values.

in original mod yes is a furnace but krastorio2 or se ...

Hello guys! I need help. I want to write an addon that allows you to use a furnace in space for se. But the problem is that when trying to add the property se_allow_in_space = true, it does not work. I tried it using table insert. does not work. Thank you for your help.

if data.raw["assembling ...