Object remove() not working, probably not using it correctly?

so im doing a tycoon, and its a multistage tycoon, so ive got wood walls u will buy in the very beginning which are small, then a little bit in you unlock stone walls which cover a larger area

im intending it to remove the wood walls and add the stone walls, well right now it adds the stone but doesnt remove the wood, tho it does remove the wood wall if i left it active, but if the wood wall is spawned in with a tycoon, then i attemt to remove it with the stone wall button it doesnt remove it

here is both scripts, any help figuring out the problem is appreciated :)

WOOD WALL SCRIPT

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model = script.Parent.Parent.Parent.WoodAge.WoodWalls

Upgradecost = 0
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upgradeStuff = model:clone()

wait(1)

model:remove()
owner = script.Parent.Parent.Parent.OwnerName 
local ting = 0

function onTouched(clicked)
    hit = clicked.Character.Head
    if ting == 0 then
    ting = 1
    check = hit.Parent:FindFirstChild("Humanoid")

    if check ~= nil then
    if hit.Parent.Name == owner.Value then
        local user = game.Players:GetPlayerFromCharacter(hit.Parent)
        local stats = user:findFirstChild("leaderstats")

        if stats ~= nil then
            local cash = stats:findFirstChild("Gold")
            if cash.Value > (Upgradecost-1) then

                cash.Value = cash.Value - Upgradecost
                upgradeStuff.Parent = script.Parent.Parent.Parent
                script.Parent.Parent:remove()

            end
        end
    end
    end

    ting = 0
    end
end

script.Parent.ClickDetector.MouseClick:connect(onTouched)

STONE WALL SCRIPT

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Wall = script.Parent.Parent.Parent.WoodAge.WoodWalls
model = script.Parent.Parent.Parent.MidStone.SmallCastle
Upgradecost = 0
-------------------------------------------------------------------------------------------------------------------------
upgradeStuff = model:clone()

wait(1)

model:remove()
owner = script.Parent.Parent.Parent.OwnerName 
local ting = 0

function onTouched(clicked)
    hit = clicked.Character.Head
    if ting == 0 then
    ting = 1
    check = hit.Parent:FindFirstChild("Humanoid")

    if check ~= nil then
    if hit.Parent.Name == owner.Value then
        local user = game.Players:GetPlayerFromCharacter(hit.Parent)
        local stats = user:findFirstChild("leaderstats")

        if stats ~= nil then
            local cash = stats:findFirstChild("Gold")
            if cash.Value > (Upgradecost-1) then

                cash.Value = cash.Value - Upgradecost
                upgradeStuff.Parent = script.Parent.Parent.Parent
                script.Parent.Parent:remove()
                Wall:remove() -- this is where i try to remove the wooden wall

            end
        end
    end
    end

    ting = 0
    end
end

script.Parent.ClickDetector.MouseClick:connect(onTouched)