LightSaber that does damage script. What is wrong with this script?

The script works except the Humanoid does not breakjoint when health = 0

local Dummy = game.Workspace.Dummy
local Players = game.Players.LocalPlayer
local Debounce = false 


Part.Touched:Connect(function(hit)
		local Humanoid = hit.Parent:FindFirstChild("Humanoid")
		if Humanoid and Debounce == false then 
			Debounce = true
			Humanoid.Health = Humanoid.Health - 25
			if Humanoid.Health == 0 then
			Humanoid.Parent:BreakJoints()
			end
			wait(1)
			Debounce = false
				
		end
end)