Save corrupted (Circuit network * does not exist)

[vereena0x14]

I was playing Factorio last night and saved the game and exited normally before shutting down my computer. This morning when I try to load my save, it starts to load and then a popup dialog comes up saying "Circuit network 268435712 does not exist". I have never used circuit networks in this save.
This also happens when I try to load my last three autosaves.

Is there any way to fix this? (Also how the heck did this even happen?)