Ordered DataStore filter malfunction

I was going through my OrderedDataStores and decided to filter one of them from duplicates.

Basically, the Keys for the stores are meant to be stored like this:

 'z'...player.UserId 

what I am trying to get rid of are:

's'...player.UserId
't'...player.UserId
-- and other keys.

It basically just converts the string at the front to a new letter and makes sure it isn’t duplicated.

Here is the code:

local OrderedPlayerScore = game.DataStoreService:GetOrderedDataStore("OrderedPlayerLevel") 
local Data = OrderedPlayerScore:GetSortedAsync(false,18,1,math.huge)
local CurPage = Data:GetCurrentPage()
for rank, inf in pairs(CurPage) do 	 	
	if string.sub(inf.key,1,1) then 	
		task.wait()		
		print(inf.key) 	
		local suc, err = pcall(function()
			if OrderedPlayerScore:GetAsync('z'..string.sub(inf.key,2,#inf.key)) and string.sub(inf.key,1,1) ~= 'z' then
				OrderedPlayerScore:RemoveAsync(inf.key) 
			end
			if not OrderedPlayerScore:GetAsync(inf.key) then
				OrderedPlayerScore:SetAsync("z"..string.sub(inf.key,2,#inf.key),inf.value) print(inf.key)
			end
		end)
		if suc then 
			OrderedPlayerScore:RemoveAsync(inf.key) 
		end
		
	end end

But after running it several times, and it seems to have filtered everything without the key 's', but the key I need to filter is 'z'.
image

Basically:

--Expected result:
z407478547

-- actual result
s407478547