Why datastore script dont saves that bool value?

I took that script from my leaderstats datastore script & changed value to save. Also this is server script. Please Help, i need that for my christmas update, one last thing to do! Script:

local ds = game:GetService("DataStoreService"):GetDataStore("QuestData")
	game.Players.PlayerAdded:Connect(function(plr)
		    wait(1)
	    local plrkey = "id_"..plr.UserId
	        local save1 = plr.PlayerGui.QuestGui.CompletedData
	 
		    local GetSaved = ds:GetAsync(plrkey)
		    if GetSaved then
			        save1.Value = GetSaved[1]
			    else
		        local NumberForSaving = {save1.Value}
			        ds:GetAsync(plrkey, NumberForSaving)
			    end
		end)
	 
	game.Players.PlayerRemoving:Connect(function(plr)
		    ds:SetAsync("id_"..plr.UserId, {plr.PlayerGui.QuestGui.CompletedData.Value})
		end)