Force field giver gives too many force field?

Hello, I made a forcefield giver, so when the player is up at spawn, he has a force field. And when he jumps down it takes he's forcefield from him again. But right now when he spawns, he gets like 20 force fields, and it looks really dumb, I have tried to use debounce, but I do not know if I did it correctly.

Code I use

local debounce = false 
function onTouched(part)
    local h = part.Parent:findFirstChild("Humanoid")
    if h~=nil and debounce == false then
        debounce = true
        Field = Instance.new("ForceField")
        Field.Parent = part.Parent
        debounce = false
        wait(4)
    end
    end

if (script.Parent ~= nil) and (script.Parent.className == "Part") then 
    connection = script.Parent.Touched:connect(onTouched)
end