Why does the script to change the player arms and legs not work?

the script is supposed to change the players arms and legs and body to something more noob like the error I get is

Unable to assign property MeshId. Script write access is restricted

local function onPartTouched(otherPart)
	
	local partParent = otherPart.Parent
	
	local humanoid = partParent:FindFirstChildWhichIsA("Humanoid")
	if humanoid then
		
		local Root = otherPart.Parent.HumanoidRootPart
		otherPart.Parent.LeftFoot.Meshid = 'http://www.roblox.com/asset/?id=1699715602'
		otherPart.Parent.LeftHand.Meshid = 'http://www.roblox.com/asset/?id=1699715537'
		otherPart.Parent.LeftLowerArm.Meshid = 'http://www.roblox.com/asset/?id=1699715541'
		otherPart.Parent.LeftLowerLeg.Meshid = 'http://www.roblox.com/asset/?id=1699715610'
		otherPart.Parent.LeftUpperArm.Meshid = 'http://www.roblox.com/asset/?id=1699715550'
		otherPart.Parent.LeftUpperLeg.Meshid = 'http://www.roblox.com/asset/?id=1699715616'
		otherPart.Parent.LowerTorso.Meshid = 'http://www.roblox.com/asset/?id=1699715652'
		otherPart.Parent.RightFoot.Meshid = 'http://www.roblox.com/asset/?id=1699715627'
		otherPart.Parent.RightHand.Meshid = 'http://www.roblox.com/asset/?id=1699715557'
		otherPart.Parent.RightLowerArm.Meshid = 'http://www.roblox.com/asset/?id=1699715562'
		otherPart.Parent.RightLowerLeg.Meshid = 'http://www.roblox.com/asset/?id=1699715632'
		otherPart.Parent.RightUpperArm.Meshid = 'http://www.roblox.com/asset/?id=1699715576'
		otherPart.Parent.RightUpperLeg.Meshid = 'http://www.roblox.com/asset/?id=1699715641'
		otherPart.Parent.UpperTorso.Meshid = 'http://www.roblox.com/asset/?id=1699715593'
		otherPart.Parent.UpperTorso.Mesh.MeshType = 'Head'
		
		
		
	end
end

script.Parent.Touched:Connect(onPartTouched)