Train Welding Humanoids Issues

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1

I am currently scripting the script that welds to the part when the anchor is off for the train system. It worked and welded but there is error.

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The script when anchor is off

local Players = game:GetService("Players")

local cars1 = script.Parent

local cars2 = script.Parent.Parent.Parent.Carriage2.WeldingHumanoids

local cars3 = script.Parent.Parent.Parent.Carriage3.WeldingHumanoids

local cars4 = script.Parent.Parent.Parent.Carriage4.WeldingHumanoids



local bools = true


local function touchontrain1 (hit)
	local player = Players:GetPlayerFromCharacter(hit.Parent)
	local humanoid = hit.Parent:findFirstChild("Humanoid")
	local humanoid2 = hit.Parent:findFirstChild("HumanoidRootPart")
	local name = player.Name
	if player.Team.Name ~= "Driver/運転士" and name and humanoid ~= nil  then

		humanoid.JumpPower = 0
		humanoid.WalkSpeed = 0
		wait(2)
		humanoid.PlatformStand = true
		local weld = Instance.new("WeldConstraint") 

		player.Character.HumanoidRootPart.Massless = true
		player.Character.LeftFoot.Massless = true
		player.Character.LeftHand.Massless = true
		player.Character.LeftLowerArm.Massless = true
		player.Character.LeftLowerLeg.Massless = true
		player.Character.LeftUpperArm.Massless = true
		player.Character.LeftUpperLeg.Massless = true
		player.Character.LowerTorso.Massless = true
		player.Character.RightFoot.Massless = true
		player.Character.RightHand.Massless = true
		player.Character.RightLowerArm.Massless = true
		player.Character.RightLowerLeg.Massless = true
		player.Character.RightUpperArm.Massless = true
		player.Character.RightUpperLeg.Massless = true
		player.Character.UpperTorso.Massless = true
		player.Character.Head.Massless = true
		weld.Part0 = humanoid2
		weld.Part1 = cars1
		weld.Name = name
		if weld and name then
			weld.Parent = cars1

		end
	end
end

local function touchontrain2 (hit)
	local player = Players:GetPlayerFromCharacter(hit.Parent)
	local humanoid = hit.Parent:findFirstChild("Humanoid")
	local humanoid2 = hit.Parent:findFirstChild("HumanoidRootPart")
	local name = player.Name
	if player.Team.Name ~= "Driver/運転士" and  name and humanoid ~= nil  then

		humanoid.JumpPower = 0
		humanoid.WalkSpeed = 0

		wait(1.5)
		humanoid.PlatformStand = true
		local weld = Instance.new("WeldConstraint") 

		player.Character.HumanoidRootPart.Massless = true
		player.Character.LeftFoot.Massless = true
		player.Character.LeftHand.Massless = true
		player.Character.LeftLowerArm.Massless = true
		player.Character.LeftLowerLeg.Massless = true
		player.Character.LeftUpperArm.Massless = true
		player.Character.LeftUpperLeg.Massless = true
		player.Character.LowerTorso.Massless = true
		player.Character.RightFoot.Massless = true
		player.Character.RightHand.Massless = true
		player.Character.RightLowerArm.Massless = true
		player.Character.RightLowerLeg.Massless = true
		player.Character.RightUpperArm.Massless = true
		player.Character.RightUpperLeg.Massless = true
		player.Character.UpperTorso.Massless = true
		player.Character.Head.Massless = true
		weld.Part0 = humanoid2
		weld.Part1 = cars2
		weld.Name = name
		if weld and name then
			weld.Parent = cars2

		end
	end
end

local function touchontrain3 (hit)
	local player = Players:GetPlayerFromCharacter(hit.Parent)
	local humanoid = hit.Parent:findFirstChild("Humanoid")
	local humanoid2 = hit.Parent:findFirstChild("HumanoidRootPart")
	local name = player.Name
	if player.Team.Name ~= "Driver/運転士" and  name and humanoid ~= nil  then

		humanoid.JumpPower = 0
		humanoid.WalkSpeed = 0

		wait(1.5)
		humanoid.PlatformStand = true
		local weld = Instance.new("WeldConstraint") 

		player.Character.HumanoidRootPart.Massless = true
		player.Character.LeftFoot.Massless = true
		player.Character.LeftHand.Massless = true
		player.Character.LeftLowerArm.Massless = true
		player.Character.LeftLowerLeg.Massless = true
		player.Character.LeftUpperArm.Massless = true
		player.Character.LeftUpperLeg.Massless = true
		player.Character.LowerTorso.Massless = true
		player.Character.RightFoot.Massless = true
		player.Character.RightHand.Massless = true
		player.Character.RightLowerArm.Massless = true
		player.Character.RightLowerLeg.Massless = true
		player.Character.RightUpperArm.Massless = true
		player.Character.RightUpperLeg.Massless = true
		player.Character.UpperTorso.Massless = true
		player.Character.Head.Massless = true
		weld.Part0 = humanoid2
		weld.Part1 = cars3
		weld.Name = name
		if weld and name then
			weld.Parent = cars3

		end
	end
end



local function touchontrain4 (hit)
	local player = Players:GetPlayerFromCharacter(hit.Parent)
	local humanoid = hit.Parent:findFirstChild("Humanoid")
	local humanoid2 = hit.Parent:findFirstChild("HumanoidRootPart")
	local name = player.Name
	if player.Team.Name ~= "Driver/運転士" and  name and humanoid ~= nil  then

		humanoid.JumpPower = 0
		humanoid.WalkSpeed = 0

		wait(1.5)
		humanoid.PlatformStand = true
		local weld = Instance.new("WeldConstraint") 

		player.Character.HumanoidRootPart.Massless = true
		player.Character.LeftFoot.Massless = true
		player.Character.LeftHand.Massless = true
		player.Character.LeftLowerArm.Massless = true
		player.Character.LeftLowerLeg.Massless = true
		player.Character.LeftUpperArm.Massless = true
		player.Character.LeftUpperLeg.Massless = true
		player.Character.LowerTorso.Massless = true
		player.Character.RightFoot.Massless = true
		player.Character.RightHand.Massless = true
		player.Character.RightLowerArm.Massless = true
		player.Character.RightLowerLeg.Massless = true
		player.Character.RightUpperArm.Massless = true
		player.Character.RightUpperLeg.Massless = true
		player.Character.UpperTorso.Massless = true
		player.Character.Head.Massless = true
		weld.Part0 = humanoid2
		weld.Part1 = cars4
		weld.Name = name
		if weld and name then
			weld.Parent = cars4

		end
	end
end









cars1.Touched:Connect(touchontrain1)



cars2.Touched:Connect(touchontrain2)

cars3.Touched:Connect(touchontrain3)



cars4.Touched:Connect(touchontrain4)

The script when the anchor is on

local Players = game:GetService("Players")



function onTouch(part) 
	local humanoid = part.Parent:findFirstChild("Humanoid")
	local player = Players:GetPlayerFromCharacter(part.Parent)
	if humanoid ~= nil then
		humanoid.JumpPower = 10
		humanoid.WalkSpeed = 16
		humanoid.PlatformStand = false
		player.Character.HumanoidRootPart.Massless = false
		player.Character.LeftFoot.Massless = false
		player.Character.LeftHand.Massless = false
		player.Character.LeftLowerArm.Massless = false
		player.Character.LeftLowerLeg.Massless = false
		player.Character.LeftUpperArm.Massless = false
		player.Character.LeftUpperLeg.Massless = false
		player.Character.LowerTorso.Massless = false
		player.Character.RightFoot.Massless = false
		player.Character.RightHand.Massless = false
		player.Character.RightLowerArm.Massless = false
		player.Character.RightLowerLeg.Massless = false
		player.Character.RightUpperArm.Massless = false
		player.Character.RightUpperLeg.Massless = false
		player.Character.UpperTorso.Massless = false
		player.Character.Head.Massless = false


	end
end

local cars1 = script.Parent

local cars2 = script.Parent.Parent.Parent.Carriage2.WeldingHumanoids

local cars3 =  script.Parent.Parent.Parent.Carriage3.WeldingHumanoids

local cars4 = script.Parent.Parent.Parent.Carriage4.WeldingHumanoids



cars1.Touched:connect(onTouch)



cars2.Touched:connect(onTouch)

cars3.Touched:connect(onTouch)



cars4.Touched:connect(onTouch)

The script for control




local changement = script.Parent.Parent.Parent.State.Anchors


changement.Changed:Connect(function()
	if changement.Value == false then
		script.Parent.WeldBreak.Enabled = false
		script.Parent.Scriptweld.Enabled= true
	elseif changement.Value == true  then
	
		script.Parent.WeldBreak.Enabled = true
		script.Parent.Scriptweld.Enabled = false
		for _ , descendant in ipairs(script.Parent.Parent.WeldingHumanoids:GetDescendants()) do
			if descendant:IsA("WeldConstraint") then
				local Weld = descendant
				Weld:Destroy()
			end
		end
		for _ , descendant in ipairs(script.Parent.Parent.Parent.Carriage2.WeldingHumanoids:GetDescendants()) do
			if descendant:IsA("WeldConstraint") then
				local Weld = descendant
				Weld:Destroy()
			end
		end
		for _ , descendant in ipairs(script.Parent.Parent.Parent.Carriage3.WeldingHumanoids:GetDescendants()) do
			if descendant:IsA("WeldConstraint") then
				local Weld = descendant
				Weld:Destroy()
			end
		end
		for _ , descendant in ipairs(script.Parent.Parent.Parent.Carriage4.WeldingHumanoids:GetDescendants()) do
			if descendant:IsA("WeldConstraint") then
				local Weld = descendant
				Weld:Destroy()
			end
		end
	
	end
end)

If possible, please explain me why.

2

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