How do I make this work with filtering enabled? [closed]

local level = game:GetService("DataStoreService"):GetDataStore("Levels")
local xp = game:GetService("DataStoreService"):GetDataStore("XP")
local axp = game:GetService("DataStoreService"):GetDataStore("AXP") -- amount of XP Needed

function savedata(dataname, playerid, value)
    game:GetService("DataStoreService"):GetDataStore(dataname):SetAsync(playerid, value)    
end



game.Players.PlayerAdded:connect(function(player)
    local leader = Instance.new("Folder")
    leader.Name = "leaderstats"
    leader.Parent = player
    local levelz = Instance.new("IntValue")
    levelz.Value = level:GetAsync(tostring(player.userId)) or 1
    levelz.Name = "Level"
    levelz.Parent = player:WaitForChild("leaderstats")
    local xpz = Instance.new("NumberValue")
    xpz.Value = xp:GetAsync(tostring(player.userId))
    xpz.Name = "XP"
    xpz.Parent = player
    local xpn = Instance.new("IntValue")
    xpn.Value = axp:GetAsync(tostring(player.userId)) or 700
    xpn.Name = "XpNeeded"
    xpn.Parent = player

    xpz.Changed:connect(function()
        if player:WaitForChild("XP").Value >= player:WaitForChild("XpNeeded").Value then
            levelz.Value = levelz.Value+1
            xpn.Value = xpn.Value+700
            savedata("Levels",player.userId,levelz.Value)
            savedata("XP",player.userId,xpz.Value)
            savedata("AXP",player.userId,xpn.Value)
        else
            savedata("Levels",player.userId,levelz.Value)
            savedata("XP",player.userId,xpz.Value)
            savedata("AXP",player.userId,xpn.Value)         
        end
    end)
end)

game.Players.PlayerRemoving:connect(function(player)
    savedata("Levels",player.userId,player.leaderstats.Level.Value)
    savedata("EXP",player.userId.player.EXP.Value)
    savedata("AXP",player.userId.player.XpNeeded.Value)
end)