SMB_FlySwarmScript is from swinging beat bags by steve40. All of his mods like better cooking station and CWSS, have many many script errors. They make your game unstable and polute your save file all the time. Just don't use them. I used to report those script errors to steve40. But he just deleted my post and blocked me without any reply. I think the only thing he cares about is DP money from Nexus.