DataStore always saves but, today it didn't? Can't figure out why.

The DataStore I made always saves but earlier today, it didn't. I'm super curious to figure out why but I couldn't think of anything. Can someone help me figure out why it would fail like that?

game.Players.PlayerRemoving:connect(function(player)
    local datastore = game:GetService("DataStoreService"):GetDataStore(player.UserId.."Save")

local statstorage = player:FindFirstChild("Currency"):GetChildren()
for i =  1, #statstorage do
    datastore:SetAsync(statstorage[i].Name, statstorage[i].Value)
    print("saved data number "..i)

end
print("Stats successfully saved")   
end)

game.Players.PlayerAdded:connect(function(player)
        local datastore = game:GetService("DataStoreService"):GetDataStore(player.UserId.."Save")

    player:WaitForChild("Currency")
    wait(1)
    local stats = player:FindFirstChild("Currency"):GetChildren()
    for i = 1, #stats do            
    stats[i].Value = datastore:GetAsync(stats[i].Name)
    print("stat numba "..i.." has been found")
        end
end)