How to fix this lava from being in a lower Y axis

original cords

script:

elseif #spawnfolder4:GetChildren() > 1 and #spawnfolder2:GetChildren() < 1  and #spawnfolder3:GetChildren() < 1 and #spawnFolder:GetChildren() < 1 then do
			game:GetService("ReplicatedStorage"):WaitForChild("yellow"):FireAllClients()
			game.Workspace.Part.Position += Vector3.new(-81, -157.5, -71.5)
			game.ServerScriptService.lose.Enabled = false
			model:remove()
			local teams = game:GetService("Teams"):GetChildren()

			game.Players.PlayerAdded:Connect(function(player)
				for i,player in pairs(game.Players:GetPlayers()) do
					if player then 
						local randomteam = teams[math.random(1, 4)]

						player.Team = randomteam
					end
				end
			end)
			wait()
			wait(5)
			model = backup:clone()
			model.Parent = game.Workspace
			model:makeJoints()
			game.ServerScriptService.lose.Enabled = true

out come:


Expected outcome