Attaching skeletalmesh to "Mesh" in character blueprint using c++ crash the engine

Development Character & Animation
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1

Im trying to attach multiple skeletal meshes into the “Mesh” of the character blueprint in c++ . But in doing so im always receiving a crash . Below is the code im using (just two lines) and the crash error thrown .

88905-meshattachbug.png
88905-meshattachbug.png1920×1080 196 KB

code :

   this->Hands_Mesh = CreateDefaultSubobject<USkeletalMeshComponent>(TEXT("Hands"));
    
    Hands_Mesh->AttachTo(this->GetMesh() );

error :

Assertion failed: ChildCount > AttachChildren.Num() [File:D:\BuildFarm\buildmachine_++UE4+Release-4.11\Engine\Source\Runtime\Engine\Private\Components\SceneComponent.cpp] [Line: 837] 
AttachChildren count increased while detaching 'Hands', likely caused by OnAttachmentChanged introducing new children, which could lead to an infinite loop.
UE4Editor.exe has triggered a breakpoint.

Any insight into what i did wrong will be appreciated . Thanks .