Unknown issue on heavy loaded modlist.

[Redevil387]

Processed 23400 npcs.
System.InvalidOperationException: Nullable object must have a value.
at Mutagen.Bethesda.Skyrim.ClassBinaryOverlay.get__SkillWeightsLocation()
at Mutagen.Bethesda.Skyrim.ClassBinaryOverlay.get_SkillWeights()
at TrueUnleveledSkyrim.Patch.NPCsPatcher.DistributeNPCPerks(Npc npc, ILinkCache linkCache, ILinkCache vanillaCache) in C:\Users\Finsa\AppData\Local\Temp\Synthesis\aaai1zl5.1rp\Git\yobril4g.tlv\Runner\TrueUnleveledSkyrim\Patch\NPCs.cs:line 342
at TrueUnleveledSkyrim.Patch.NPCsPatcher.PatchNPCs(IPatcherState2 state) in C:\Users\Finsa\AppData\Local\Temp\Synthesis\aaai1zl5.1rp\Git\yobril4g.tlv\Runner\TrueUnleveledSkyrim\Patch\NPCs.cs:line 914 at TrueUnleveledSkyrim.Patcher.RunPatch(IPatcherState2 state) in C:\Users\Finsa\AppData\Local\Temp\Synthesis\aaai1zl5.1rp\Git\yobril4g.tlv\Runner\TrueUnleveledSkyrim\Program.cs:line 46
at Mutagen.Bethesda.Synthesis.SynthesisPipeline.<>c__DisplayClass16_02.<<AddPatch>b__0>d.MoveNext() --- End of stack trace from previous location --- at Mutagen.Bethesda.Synthesis.SynthesisPipeline.Run(RunSynthesisMutagenPatcher args, Nullable1 exportKey, IFileSystem fileSystem)
at Mutagen.Bethesda.Synthesis.SynthesisPipeline.<>c__DisplayClass45_0.<b__0>d.MoveNext()
--- End of stack trace from previous location ---
at Mutagen.Bethesda.Synthesis.SynthesisPipeline.HandleOnShutdown(Func`1 a)
at Mutagen.Bethesda.Synthesis.SynthesisPipeline.Run(RunSynthesisMutagenPatcher args, IFileSystem fileSystem)
at Mutagen.Bethesda.Synthesis.SynthesisPipeline.<>c__DisplayClass44_0.<b__1>d.MoveNext()