Motor6D and Model isnt destroying

I have a weights model and a motor6D weld called BenchpressMotor6D


And my script is suppost to delete both of them once the seats occupant == nil, but it isnt

local sitAnim = 18201895983
local seat = script.Parent
local playingAnim 

local newAnim = Instance.new('Animation')
newAnim.AnimationId = 'rbxassetid://'..sitAnim

seat.Changed:Connect(function(property)
	if property == 'Occupant' then
		local occupant = seat.Occupant
		if not occupant then if playingAnim then playingAnim:Stop() return end end
		playingAnim = occupant:LoadAnimation(newAnim)
		playingAnim:Play()
	end
	if script.Parent.Occupant == nil then
		local player = game:GetService("Players"):FindFirstChildOfClass("Player")
		local character = player.Character
		local rightHand = character:WaitForChild("RightHand")
		
		if rightHand:WaitForChild("BasicBenchPressWeights", 10000000000000000000000) then
			rightHand.BasicBenchPressWeights:Destroy()
			rightHand.BenchpressMotor6D:Destroy()
		end
	end
end)

Any help?

Well first of, when going on it and it finds the Occupant, then it sets the PlayingAnim. But the problem is, if you exit then it returns the whole Function because it founds no occupant but a playinganim. And also, the local player is bad, since it will find someone that is the first child in the Players Folder. So it will never get the player who just stepped out.

so whats the best way i could change my script?

local lastoccupant = nil

seat.Changed:Connect(function(property)
	if property == 'Occupant' then
		if seat.Occupant then
			local lastoccupant = seat.Occupant
			playingAnim = lastoccupant:LoadAnimation(newAnim)
			playingAnim:Play()
		else
			if lastoccupant then else return end
			local character = lastoccupant.Parent
			local rightHand = character:WaitForChild("RightHand")

			if rightHand:WaitForChild("BasicBenchPressWeights", 10000000000000000000000) then
				rightHand.BasicBenchPressWeights:Destroy()
				rightHand.BenchpressMotor6D:Destroy()
			end
			lastoccupant = nil
		end
		
	end
end)

same problem