Ragnarok Bug. Keep crashing upon loading in

[Nicepherous]

Ragnarok Bug. Keep crashing upon loading in

Can someone tell me please what the hell this means? also tell me what is causing me to crash. when i go from the highlands to viking bay, or highlands to green obelisk, once i get halfway, i crash, and end up in a crash loop. when i load in, i crash. if i die, im good. i just cant go in that area with a flyer. non flyers seem to be just fine, but flyers, since the most recent patch, seem to mess up my game badly. any help is greatly appreciated. heres the crash log:

 

LowLevelFatalError [File:F:\build\trunk\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp] [Line: 3920] 
Bad name index 50331648/1429

VERSION: 307.59 
KERNELBASE.dll!UnknownFunction (0x00007ffd6e8da859) + 0 bytes [UnknownFile:0]
ShooterGame.exe!FError::LowLevelFatal() (0x00007ff621ea1175) + 0 bytes [f:\build\trunk\engine\source\runtime\core\private\misc\outputdevice.cpp:354]
ShooterGame.exe!ULinkerLoad::operator<<() (0x00007ff621f3ea6e) + 34 bytes [f:\build\trunk\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3920]
ShooterGame.exe!operator<<() (0x00007ff621f1074f) + 0 bytes [f:\build\trunk\engine\source\runtime\coreuobject\public\uobject\propertytag.h:74]
ShooterGame.exe!UStruct::SerializeTaggedProperties() (0x00007ff621f1dc4a) + 0 bytes [f:\build\trunk\engine\source\runtime\coreuobject\private\uobject\class.cpp:757]
ShooterGame.exe!UStructProperty::SerializeItem() (0x00007ff621f6ff63) + 0 bytes [f:\build\trunk\engine\source\runtime\coreuobject\private\uobject\propertystruct.cpp:138]
ShooterGame.exe!UArrayProperty::SerializeItem() (0x00007ff621f63587) + 38 bytes [f:\build\trunk\engine\source\runtime\coreuobject\private\uobject\propertyarray.cpp:77]
ShooterGame.exe!FPropertyTag::SerializeTaggedProperty() (0x00007ff621f10993) + 0 bytes [f:\build\trunk\engine\source\runtime\coreuobject\public\uobject\propertytag.h:143]
ShooterGame.exe!UStruct::SerializeTaggedProperties() (0x00007ff621f1f13f) + 0 bytes [f:\build\trunk\engine\source\runtime\coreuobject\private\uobject\class.cpp:1243]
ShooterGame.exe!UStructProperty::SerializeItem() (0x00007ff621f6ff63) + 0 bytes [f:\build\trunk\engine\source\runtime\coreuobject\private\uobject\propertystruct.cpp:138]
ShooterGame.exe!FPropertyTag::SerializeTaggedProperty() (0x00007ff621f10993) + 0 bytes [f:\build\trunk\engine\source\runtime\coreuobject\public\uobject\propertytag.h:143]
ShooterGame.exe!UStruct::SerializeTaggedProperties() (0x00007ff621f1f13f) + 0 bytes [f:\build\trunk\engine\source\runtime\coreuobject\private\uobject\class.cpp:1243]
ShooterGame.exe!UStructProperty::SerializeItem() (0x00007ff621f6ff63) + 0 bytes [f:\build\trunk\engine\source\runtime\coreuobject\private\uobject\propertystruct.cpp:138]
ShooterGame.exe!FPropertyTag::SerializeTaggedProperty() (0x00007ff621f10993) + 0 bytes [f:\build\trunk\engine\source\runtime\coreuobject\public\uobject\propertytag.h:143]
ShooterGame.exe!UStruct::SerializeTaggedProperties() (0x00007ff621f1f13f) + 0 bytes [f:\build\trunk\engine\source\runtime\coreuobject\private\uobject\class.cpp:1243]
ShooterGame.exe!UObject::SerializeScriptProperties() (0x00007ff621f540b8) + 0 bytes [f:\build\trunk\engine\source\runtime\coreuobject\private\uobject\obj.cpp:1065]
ShooterGame.exe!UObject::Serialize() (0x00007ff621f53fcc) + 0 bytes [f:\build\trunk\engine\source\runtime\coreuobject\private\uobject\obj.cpp:1023]
ShooterGame.exe!UPrimitiveComponent::Serialize() (0x00007ff6227cb8f5) + 5 bytes [f:\build\trunk\engine\source\runtime\engine\private\primitivecomponent.cpp:643]
ShooterGame.exe!UStaticMeshComponent::Serialize() (0x00007ff6228d5045) + 0 bytes [f:\build\trunk\engine\source\runtime\engine\private\staticmeshcomponent.cpp:249]
ShooterGame.exe!ULinkerLoad::Preload() (0x00007ff621f3c25b) + 0 bytes [f:\build\trunk\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2985]
ShooterGame.exe!FAsyncPackage::CreateExports() (0x00007ff621f162ab) + 0 bytes [f:\build\trunk\engine\source\runtime\coreuobject\private\serialization\asyncloading.cpp:1056]
ShooterGame.exe!FAsyncPackage::Tick() (0x00007ff621f14ac2) + 8 bytes [f:\build\trunk\engine\source\runtime\coreuobject\private\serialization\asyncloading.cpp:296]
ShooterGame.exe!ProcessAsyncLoading() (0x00007ff621f17888) + 24 bytes [f:\build\trunk\engine\source\runtime\coreuobject\private\serialization\asyncloading.cpp:1580]
ShooterGame.exe!FlushAsyncLoading() (0x00007ff621f175a2) + 17 bytes [f:\build\trunk\engine\source\runtime\coreuobject\private\serialization\asyncloading.cpp:1433]
ShooterGame.exe!ULevelStreaming::RequestLevel() (0x00007ff6227428ef) + 0 bytes [f:\build\trunk\engine\source\runtime\engine\private\levelstreaming.cpp:501]
ShooterGame.exe!UWorld::UpdateLevelStreamingInner() (0x00007ff622955cae) + 23 bytes [f:\build\trunk\engine\source\runtime\engine\private\world.cpp:2561]
ShooterGame.exe!UWorld::UpdateLevelStreaming() (0x00007ff62295609d) + 0 bytes [f:\build\trunk\engine\source\runtime\engine\private\world.cpp:2678]
ShooterGame.exe!UGameViewportClient::Draw() (0x00007ff622690274) + 0 bytes [f:\build\trunk\engine\source\runtime\engine\private\gameviewportclient.cpp:901]
ShooterGame.exe!FViewport::Draw() (0x00007ff622911e78) + 0 bytes [f:\build\trunk\engine\source\runtime\engine\private\unrealclient.cpp:1147]
ShooterGame.exe!UGameEngine::RedrawViewports() (0x00007ff622672f01) + 0 bytes [f:\build\trunk\engine\source\runtime\engine\private\gameengine.cpp:597]
ShooterGame.exe!UGameEngine::Tick() (0x00007ff622674ee7) + 0 bytes [f:\build\trunk\engine\source\runtime\engine\private\gameengine.cpp:1260]
ShooterGame.exe!FEngineLoop::Tick() (0x00007ff62024fa91) + 0 bytes [f:\build\trunk\engine\source\runtime\launch\private\launchengineloop.cpp:2432]
ShooterGame.exe!GuardedMain() (0x00007ff62024a10c) + 0 bytes [f:\build\trunk\engine\source\runtime\launch\private\launch.cpp:140]
ShooterGame.exe!GuardedMainWrapper() (0x00007ff62025100a) + 5 bytes [f:\build\trunk\engine\source\runtime\launch\private\windows\launchwindows.cpp:125]
ShooterGame.exe!WinMain() (0x00007ff620251159) + 8 bytes [f:\build\trunk\engine\source\runtime\launch\private\windows\launchwindows.cpp:213]
ShooterGame.exe!__tmainCRTStartup() (0x00007ff623945951) + 21 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618]
KERNEL32.DLL!UnknownFunction (0x00007ffd6fb77bd4) + 0 bytes [UnknownFile:0]
ntdll.dll!UnknownFunction (0x00007ffd70f2ced1) + 0 bytes [UnknownFile:0]
ntdll.dll!UnknownFunction (0x00007ffd70f2ced1) + 0 bytes [UnknownFile:0]