How to fix a 'is server updated' script?

Hello, I have been working on a script that recognises if the server is at the latest possible version. I thought the best way to do this was to create a script that when the new server starts up, it updates a variable to show the latest version.

I made this script to do that (running in ServerScriptService):

local DataStoreService = game:GetService("DataStoreService")
local versionStore = DataStoreService:GetDataStore("versionData")

local function version()
	local suc, err = pcall(function()
		versionStore:SetAsync("xdDxd8734372$$%^|%", game.PlaceVersion)
		game.ReplicatedStorage.MaxVersion.Value = game.PlaceVersion
	end)
	if err then
		version()
	end
end
version()

local function update1()
	local success, currentVersion = pcall(function()
		return versionStore:GetAsync("xdDxd8734372$$%^|%")
	end)
end

local update = function()
	game.ReplicatedStorage.MaxVersion.Value = update1()
end
update = versionStore:OnUpdate("xdDxd8734372$$%^|%", update)

print(game.ReplicatedStorage.MaxVersion.Value)

I went to test the script. However, the: OnUpdate function does not work over servers. Do you know an alternative to this function or a completely different way to do this (eg using Pastebin)?

Any help would be appreciated.