Why does this mousebutton1 script repeat itself?

So I'm making an axe script for a simulator alike game, and what's supposed to happen is that if you stand in front of a tree and press MB1 the Axe would play the classic "roblox sword animation" and destroy the tree. It works as expected, except for the fact that whenever the tree respawns I don't have to click for the same thing to happen again. Please help!

Script inside the axe:

local player = game.Players.LocalPlayer
local char = player.Character or player.CharacterAdded:Wait()

local Backpack = player.Backpack
local Tool = Backpack.DefaultAxe
local mouse = player:GetMouse()

local scan = script.Parent.Parent.scan

Tool.Equipped:Connect(function() 
mouse.Button1Down:Connect(function()




        local a = script.Parent.animation
        local MouseTarget = mouse.Target
        local anim = Instance.new("Animation")
        local humanoid = char:WaitForChild("Humanoid")
        anim.AnimationId = "rbxassetid://80395075"
        local animator = humanoid:FindFirstChildOfClass("Animator")
        local track = animator:LoadAnimation(anim)

        local part = "scanpart"
        scan.Touched:Connect(function(hit)
                if hit.Name == part then
                track:Play()
                hit.Parent:Destroy()
                end
end) 
end)
end)

mouse.Button1Down:Connect(mouse)