I just got the following error trying to load a save that was created in version 0.17.6. The save is also attached. I have successfully saved and loaded this gave before, although I made a lot of progress last night (unlocked red circuits and military 2, built steel, etc). The relevant migration is:...

I've just finished a 4-reactor build with a steam buffer, using Bob's highest level turbines and heat exchangers. These do not begin producing power until 765C, which helps with the reactor startup, but also requires me to run pretty hot (~840C) before all of my heat exchangers reach the 765C minimu...