My Model DeadBody wont spawn in the right place?

DedScript = game.Workspace.Human.DeadBody
ded = game.ReplicatedStorage.Dead:Clone()
chest = game.Workspace.Human.Torso
Heart = Instance.new("Part")
	
local w = Instance.new('Weld')
	w.Part0 = Heart
	w.Part1 = chest
	w.C0 = CFrame.new(0, 0, 0)*CFrame.Angles(0 , 0, 0)
	w.Parent = chest

if DedScript.Parent.Humanoid.Health<1 then
	
	Heart.Parent = workspace
	Heart.Transparency = 0
	
	ded.Parent = workspace
	
	primary_part = ded.Torso
	ded.PrimaryPart = primary_part
	
	
	primary_part.Anchored = true
	for index = 1, 8 do
local part = ded["Part" .. index] 
local weld = Instance.new("Weld")
	   
		weld.Part0 = primary_part
	    weld.Part1 = part
	    weld.C1 = part.CFrame:toObjectSpace(primary_part.CFrame)
	    weld.Parent = primary_part
	    part.Anchored = true	
	
local w2 = Instance.new('Weld')
		w2.Part0 = Heart
		w2.Part1 = primary_part
		w2.C0 = CFrame.new(0, 0, 0)*CFrame.Angles(0 , 0, 0)
		w2.Parent = primary_part
		
		ded:SetPrimaryPartCFrame(Heart * CFrame.new(0, 0, 0))
	
	
	end

end

I have an NPC called Human in workspace. When it dies the part name "Heart" should spawn at its torso that I've named "Chest". Then a Model Dead Body that I've put in Replicated Storage should be cloned into workspace (Ive named the clone "ded") and placed where the Heart is. However it doesnt seem to work. It gives me this error on line 40

"Workspace.Human.Dead:43: bad argument #1 to '?' (CFrame expected, got userdata) Script 'Workspace.Human.DeadBody', Line 40 Stack End"

DeadBody is the name of the script. Please help me with this.