Crit Error

HI i have this problem :

SkeletalMesh Magic.MMagic_m000_f: Serial size mismatch: Got 42689, Expected 42693

History: LoadObject <- (SkeletalMesh Magic.MMagic_m000_f 7693733==7693733/16429047 7651044 42693) <- ULinkerLoad::Preload <- PreLoadObjects <- UObject::EndLoad <- UObject::StaticLoadObject <- (Engine.Mesh Magic.MMagic_m000_f NULL) <- UMeshComponent::LoadMeshComponent <- UMeshContainer::UpdateFirstMeshComponent <- AActor::UpdateFirstMeshComponent <- User::UpdatePawnMeshContainerByFace <- User::UpdatePawnMeshContainer <- User::SetPawnResource <- UUIScript::execSpawnDefaultCharacter <- UObject::ProcessEvent <- (CharacterCreateMenuWnd Transient.CharacterCreateMenuWnd0, Function Interface.CharacterCreateMenuWnd.OnEvent) <- XMLUIManager::ExecuteUIEvent <- NConsoleWnd::AcceptNewCharacter <- UNetworkHandler::Tick <- Function Name=NewCharacterSuc <- UGameEngine::Tick <- UpdateWorld <- MainLoop

I know many of u have the same problem y reinstall it twise but its still the same, what shall i do?