Datastore attempts to index number with number and fails?

So when the datastore script tries to get the Cubes value from the Datastore, it gives me an error saying "ServerScriptService.Datastore:9: Attempted to index number with number" which I have no idea on how to fix.

Datastore script:

local datastore = game:GetService("DataStoreService"):GetDataStore("SaveData")
game.Players.PlayerAdded:Connect(function(plr)
	wait()
	local plrid = "id_"..plr.UserId
	local save1 = plr.leaderstats.Cubes
	
	local GetSaved = datastore:GetAsync(plrid)
	if GetSaved then
		save1.Value = GetSaved[0]
	else
		local NumSave = {save1.Value}
		datastore:GetAsync(plrid,NumSave)
	end
end)

game.Players.PlayerRemoving:Connect(function(plr)
	datastore:SetAsync("id_"..plr.UserId,plr.leaderstats.Cubes.Value)
end)

Leaderstats script:

local Players = game:GetService("Players")

local function leaderboardSetup(player)
	local leaderstats = Instance.new("Folder")
	leaderstats.Name = "leaderstats"
	leaderstats.Parent = player
	
	local cubesmade = Instance.new("IntValue")
	cubesmade.Name = "Cubes"
	cubesmade.Value = 0
	cubesmade.Parent = leaderstats
end

Players.PlayerAdded:Connect(leaderboardSetup)

GetSaved[1] and local GetSaved = datastore:GetAsync("id_"..plrid)

Line 17 column 36: Replace the comma to a dot