Hehe.. ue4 editor crashed when startup

Yeah it crashed constantly

It printed some crash report
but I can’t understand it ehh…

what’s problem?

crash report:

LoginId:e759e4984668e285f79d91945f057c06
   EpicAccountId:961b3f771bb74d66b0e5913b6022617c
   
   Fatal error:
   [File:D:\Build\++UE4+Release-4.19+Compile\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp]
   [Line: 3762] Default subobject
   CameraComponent SPRINGARM already
   exists for ABCharacter
   /Script/ArenaBattle.Default__ABCharacter.
   
   UE4Editor_Core!FDebug::AssertFailed()
   [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:419]
   UE4Editor_CoreUObject!FObjectInitializer::CreateDefaultSubobject()
   [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:3762]
   UE4Editor_CoreUObject!UObject::CreateDefaultSubobject()
   [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\coreuobject\private\uobject\obj.cpp:105]
   UE4Editor_ArenaBattle_9572!AABCharacter::AABCharacter()
   [e:\program\unreal\arenabattle\source\arenabattle\abcharacter.cpp:13]
   UE4Editor_CoreUObject!UClass::CreateDefaultObject()
   [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\coreuobject\private\uobject\class.cpp:2749]
   UE4Editor_CoreUObject!UObjectLoadAllCompiledInDefaultProperties()
   [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectbase.cpp:821]
   UE4Editor_CoreUObject!ProcessNewlyLoadedUObjects()
   [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectbase.cpp:895]
   UE4Editor_CoreUObject!TBaseStaticDelegateInstance::ExecuteIfSafe() [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:788]
   UE4Editor_Core!TBaseMulticastDelegate::Broadcast()
   [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\core\public\delegates\delegatesignatureimpl.inl:937]
   UE4Editor_Core!FModuleManager::LoadModuleWithFailureReason()
   [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\core\private\modules\modulemanager.cpp:487]
   UE4Editor_Projects!FModuleDescriptor::LoadModulesForPhase()
   [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\projects\private\moduledescriptor.cpp:484]
   UE4Editor_Projects!FProjectManager::LoadModulesForProject()
   [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\projects\private\projectmanager.cpp:69]
   UE4Editor!FEngineLoop::LoadStartupModules()
   [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\launch\private\launchengineloop.cpp:2610]
   UE4Editor!FEngineLoop::PreInit()
   [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\launch\private\launchengineloop.cpp:2027]
   UE4Editor!GuardedMain()
   [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\launch\private\launch.cpp:127]
   UE4Editor!GuardedMainWrapper()
   [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:144]
   UE4Editor!WinMain()
   [d:\build\++ue4+release-4.19+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:223]
   UE4Editor!__scrt_common_main_seh()
   [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:253]
   kernel32 ntdll