If two loadouts use the same armor piece with different mods the following can occur. Loadout 1 Mod costs: 4, 1, 3, 2 Loadout 2 Mod costs 4, 3, 2, 1 When switching from Loadout 1 to Loadout 2: Bug is likely: Mod slot 2 is trying to exchange a 1 cost mod with a 3 cost mod giving an error as the total is above 10. Potential fix: Re-code this so that mods are cleared and then applied instead of exchanged.