why is my script placing models more then one time?

Hi, i try to make a model placing script. I kinda managed that the model is following the mouse when the mouse is targeting the user base. But when i click instead of spawning the model once it spams itlike 20-30 times. Shouldnt the debounce prevent that?

local rs = game:GetService("ReplicatedStorage")

local b = rs:WaitForChild("Build")

local plr = game.Players.LocalPlayer
local mouse = plr:GetMouse()
local debounce = false

function b.OnClientInvoke()
local model = rs.Items.Field:Clone()
    model.Parent = workspace

    local plot = workspace.Plot1

    local x = plot:GetModelCFrame().p.X
    local y = plot:GetModelCFrame().p.Y
    local z = plot:GetModelCFrame().p.Z

    local px = 50
    local py = 0.2
    local pz = 50

    local fx = 5.4
    local fy = model.Base.Size.Y
    local fz = 5.4

    minx = -20
    maxx = 20

    minz = -20
    maxz = 20


    local mx,my,mz, maxmx,maxmz,minmx,minmz

    mouse.Move:Connect(function()
        if debounce == false then
            debounce = true

            if mouse.Hit.X >= 0 then
                mx = math.floor(mouse.Hit.X) - x
            else
                mx = x - math.floor(mouse.Hit.X)
            end

            if mouse.Hit.Z >= 0 then
                mz = math.floor(mouse.Hit.Z) - z
            else
                mz = z - math.floor(mouse.Hit.Z)
            end

            maxmx = mx + 2.7
            minmx = mx - 2.7

            maxmz = mz + 2.7
            minmz = mz - 2.7

            if maxmx <= maxx and minmx >= minx then
                if maxmz <= maxz and minmz >= minz then
                    model:MoveTo(Vector3.new(math.floor(mouse.Hit.X),y,math.floor(mouse.Hit.Z)))

                end
            else
                model:MoveTo(Vector3.new(0,0,0))
            end


        mouse.Button1Down:Connect(function()

                    local model = model:Clone()
                    model.Base.CanCollide = true
                    model.Part.CanCollide = true
                    model.Parent = workspace.Plot1
                    wait(0.5)
                    model:MoveTo(Vector3.new(math.floor(mouse.Hit.X),y,math.floor(mouse.Hit.Z)))


        end)
        wait(0.1)
        debounce = false
        end
    end)
end