Double data problem?

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#1

So for some reason I get this error:

DataStoreService: ValueNotAllowed: double is not allowed in data stores. API: UpdateAsync, Data Store: Leaderboard

whe trying to do this:

local data = game:GetService("DataStoreService"):GetOrderedDataStore("Leaderboard")`

here are my leaderstats:

local DataStoreService = game:GetService("DataStoreService")
local bestLuckStore = DataStoreService:GetDataStore("BestLuckStore")
local players = game:GetService("Players")

players.PlayerAdded:Connect(function(player)
	local savedBestLuck = bestLuckStore:GetAsync(player.UserId)
	
	local leaderstats = Instance.new("Folder")
	leaderstats.Name = "leaderstats"
	leaderstats.Parent = player
	
	local bestLuckValue = Instance.new("NumberValue")
	bestLuckValue.Name = "BestLuck"
	bestLuckValue.Parent = leaderstats
	
	if savedBestLuck ~= nil then
		bestLuckValue.Value = savedBestLuck
	end
	
	bestLuckValue.Changed:Connect(function(newBestLuck) -- luck = 99.1
		newBestLuck = newBestLuck * 10 -- new its = 991
		bestLuckStore:SetAsync(player.UserId, newBestLuck)
	end)
end)

I thought the problem was that it could not get deciamls so I did this but still I get the error

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#2 
local savedBestLuck = bestLuckStore:GetAsync(player.UserId

bestLuckValue.Value = savedBestLuck

Probably because its not a value.
isn’t this to call saved datastore?

#3

yes,b ut I think because I have a decimal saved

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