Strange error log about personal sheilds

[GrumpyOldTroll]

RimWorld 0.17.1546 rev889
Verse.Log:Message(String)
RimWorld.VersionControl:LogVersionNumber()
Verse.Root:CheckGlobalInit()
Verse.Root:Start()
Verse.Root_Entry:Start()

Mods config data is from build 1393 while we are at build 1546. Resetting.
Verse.Log:Message(String)
Verse.ModsConfig:.cctor()
Verse.LoadedModManager:LoadAllActiveMods()
Verse.LoadedModManager:LoadAllActiveMods()
Verse.PlayDataLoader:DoPlayLoad()
Verse.PlayDataLoader:LoadAllPlayData(Boolean)
Verse.Root:<Start>m__851()
Verse.LongEventHandler:RunEventFromAnotherThread(Action)
Verse.LongEventHandler:<UpdateCurrentAsynchronousEvent>m__84F()

Could not resolve cross-reference to RimWorld.ConceptDef named PersonalShields
Verse.Log:Error(String)
Verse.DirectXmlCrossRefLoader:TryResolveDef(String, FailMode)
Verse.WantedRefForDictionary`2:TryResolve(FailMode)
Verse.DirectXmlCrossRefLoader:ResolveAllWantedCrossReferences(FailMode)
Verse.DirectXmlLoader:ItemFromXmlFile(String, Boolean)
RimWorld.PlayerKnowledgeDatabase:ReloadAndRebind()
RimWorld.PlayerKnowledgeDatabase:.cctor()
Verse.PlayDataLoader:DoPlayLoad()
Verse.PlayDataLoader:DoPlayLoad()
Verse.PlayDataLoader:LoadAllPlayData(Boolean)
Verse.Root:<Start>m__851()
Verse.LongEventHandler:RunEventFromAnotherThread(Action)
Verse.LongEventHandler:<UpdateCurrentAsynchronousEvent>m__84F()

Failed to load key/value pair: , 1
Verse.Log:Error(String)
Verse.WantedRefForDictionary`2:TryResolve(FailMode)
Verse.DirectXmlCrossRefLoader:ResolveAllWantedCrossReferences(FailMode)
Verse.DirectXmlLoader:ItemFromXmlFile(String, Boolean)
RimWorld.PlayerKnowledgeDatabase:ReloadAndRebind()
RimWorld.PlayerKnowledgeDatabase:.cctor()
Verse.PlayDataLoader:DoPlayLoad()
Verse.PlayDataLoader:DoPlayLoad()
Verse.PlayDataLoader:LoadAllPlayData(Boolean)
Verse.Root:<Start>m__851()
Verse.LongEventHandler:RunEventFromAnotherThread(Action)
Verse.LongEventHandler:<UpdateCurrentAsynchronousEvent>m__84F()

Knowledge data was missing key ShieldBelts. Adding it...
Verse.Log:Warning(String)
RimWorld.PlayerKnowledgeDatabase:ReloadAndRebind()
RimWorld.PlayerKnowledgeDatabase:.cctor()
Verse.PlayDataLoader:DoPlayLoad()
Verse.PlayDataLoader:DoPlayLoad()
Verse.PlayDataLoader:LoadAllPlayData(Boolean)
Verse.Root:<Start>m__851()
Verse.LongEventHandler:RunEventFromAnotherThread(Action)
Verse.LongEventHandler:<UpdateCurrentAsynchronousEvent>m__84F()

Knowledge data was missing key DoorOpenSpeed. Adding it...
Verse.Log:Warning(String)
RimWorld.PlayerKnowledgeDatabase:ReloadAndRebind()
RimWorld.PlayerKnowledgeDatabase:.cctor()
Verse.PlayDataLoader:DoPlayLoad()
Verse.PlayDataLoader:DoPlayLoad()
Verse.PlayDataLoader:LoadAllPlayData(Boolean)
Verse.Root:<Start>m__851()
Verse.LongEventHandler:RunEventFromAnotherThread(Action)
Verse.LongEventHandler:<UpdateCurrentAsynchronousEvent>m__84F()

Could not resolve cross-reference to RimWorld.ConceptDef named PersonalShields
Verse.Log:Error(String)
Verse.DirectXmlCrossRefLoader:TryResolveDef(String, FailMode)
Verse.WantedRefForDictionary`2:TryResolve(FailMode)
Verse.DirectXmlCrossRefLoader:ResolveAllWantedCrossReferences(FailMode)
Verse.DirectXmlLoader:ItemFromXmlFile(String, Boolean)
RimWorld.PlayerKnowledgeDatabase:ReloadAndRebind()
Verse.PlayDataLoader:DoPlayLoad()
Verse.PlayDataLoader:LoadAllPlayData(Boolean)
Verse.Root:<Start>m__851()
Verse.LongEventHandler:RunEventFromAnotherThread(Action)
Verse.LongEventHandler:<UpdateCurrentAsynchronousEvent>m__84F()

Failed to load key/value pair: , 1
Verse.Log:Error(String)
Verse.WantedRefForDictionary`2:TryResolve(FailMode)
Verse.DirectXmlCrossRefLoader:ResolveAllWantedCrossReferences(FailMode)
Verse.DirectXmlLoader:ItemFromXmlFile(String, Boolean)
RimWorld.PlayerKnowledgeDatabase:ReloadAndRebind()
Verse.PlayDataLoader:DoPlayLoad()
Verse.PlayDataLoader:LoadAllPlayData(Boolean)
Verse.Root:<Start>m__851()
Verse.LongEventHandler:RunEventFromAnotherThread(Action)
Verse.LongEventHandler:<UpdateCurrentAsynchronousEvent>m__84F()

Knowledge data was missing key ShieldBelts. Adding it...
Verse.Log:Warning(String)
RimWorld.PlayerKnowledgeDatabase:ReloadAndRebind()
Verse.PlayDataLoader:DoPlayLoad()
Verse.PlayDataLoader:LoadAllPlayData(Boolean)
Verse.Root:<Start>m__851()
Verse.LongEventHandler:RunEventFromAnotherThread(Action)
Verse.LongEventHandler:<UpdateCurrentAsynchronousEvent>m__84F()

Knowledge data was missing key DoorOpenSpeed. Adding it...
Verse.Log:Warning(String)
RimWorld.PlayerKnowledgeDatabase:ReloadAndRebind()
Verse.PlayDataLoader:DoPlayLoad()
Verse.PlayDataLoader:LoadAllPlayData(Boolean)
Verse.Root:<Start>m__851()
Verse.LongEventHandler:RunEventFromAnotherThread(Action)
Verse.LongEventHandler:<UpdateCurrentAsynchronousEvent>m__84F()

any help here? I downloaded a few mods through workshop, but it has nothing to do with them so far as I can tell. Alpha 17 here.

[Calahan]

Thank you for the bug report. Are you still getting this error? As it looks like the game is detecting some traces of an older version of the game, which is an error I have had recently on occasions when switching between A17 and A16. It usually goes away after restating the game (without changing version inbetween).

So as I said can you please let us know if you are still having this error. Thanks.

[ison]

It's harmless, you can safely ignore these errors. Thanks for reporting though.