How To Remove The "Left Arm" Weld?

Can somebody help me? I'm trying to get rid of the line were it say "Left Arm" but it didn't work for me. When I tested it my left arm fall off instead.... I want only the "Right Arm" to work, not both arms. I've tried many times and the arm keep falling off, what did I do wrong? Can you guys help me?

Here's an image to see what I'm talking about:

https://gyazo.com/4e24b619184f5c3c08fd9b819a69277b

This is a regular script that goes into the tool:

Name of this script: (WeldArm)

Tool = script.Parent;
local arms = nil
local torso = nil
local welds = {}

function Equip(mouse)
wait(0.01)
arms = {Tool.Parent:FindFirstChild("Left Arm"), Tool.Parent:FindFirstChild("Right Arm")}
torso = Tool.Parent:FindFirstChild("Torso")
if arms ~= nil and torso ~= nil then
local sh = {torso:FindFirstChild("Left Shoulder"), torso:FindFirstChild("Right Shoulder")}
if sh ~= nil then
local yes = true
if yes then
yes = false
sh[1].Part1 = nil
sh[2].Part1 = nil
local weld1 = Instance.new("Weld")
weld1.Part0 = torso
weld1.Parent = torso
weld1.Part1 = arms[1]
weld1.C1 = CFrame.new(1.5, 0.5, 0.5) * CFrame.fromEulerAnglesXYZ(math.rad(-90), 0, math.rad(0))
welds[1] = weld1
local weld2 = Instance.new("Weld")
weld2.Part0 = torso
weld2.Parent = torso
weld2.Part1 = arms[2]
weld2.C1 = CFrame.new(-1.5, 0.5, 0.5) * CFrame.fromEulerAnglesXYZ(math.rad(-90), math.rad(0), 0)
welds[2] = weld2
end
else
print("sh")
end
else
print("arms")
end
end

function Unequip(mouse)
if arms ~= nil and torso ~= nil then
local sh = {torso:FindFirstChild("Left Shoulder"), torso:FindFirstChild("Right Shoulder")}
if sh ~= nil then
local yes = true
if yes then
yes = false
sh[1].Part1 = arms[1]
sh[2].Part1 = arms[2]
welds[1].Parent = nil
welds[2].Parent = nil
end
else
print("sh")
end
else
print("arms")
end
end
Tool.Equipped:connect(Equip)
Tool.Unequipped:connect(Unequip)

Many thanks my friends!