When a player joins a game with players in it, he gets the data of the other player?

So, when I was playing with my friend in my game, when he joined, he got the exact same data as me, but it was the first time joining my game, so that shouldn't be happening. My script:

local purchasedfolder = game.Workspace.PurchasedValues
local HttpService = game:GetService("HttpService")
local DataStoreService = game:GetService("DataStoreService")
local DataStore = DataStoreService:GetDataStore("CarPurchasedDataStore")
game.Players.PlayerAdded:Connect(function(player)
	local key = player.Name.."-"..player.UserId
	local encodedData = nil
	pcall(function()
	encodedData = DataStore:GetAsync(key)
	end)
		if encodedData ~= nil then
	local data = HttpService:JSONDecode(encodedData)
	-- Set the values from the decoding
	purchasedfolder.Purchasedbmw.Value = data[1]
	purchasedfolder.Purchasedgtr.Value = data[2]
	purchasedfolder.Purchasedhoon.Value = data[3]
	purchasedfolder.Purchasedmc.Value = data[4]
	purchasedfolder.Purchasedpor.Value = data[5]
	purchasedfolder.Purchaseds13.Value = data[6]
	print("Loaded all the values")
	end
end)
game.Players.PlayerRemoving:Connect(function(player)
	local data  = {
    	purchasedfolder.Purchasedbmw.Value,
	    purchasedfolder.Purchasedgtr.Value, 
	    purchasedfolder.Purchasedhoon.Value,
	    purchasedfolder.Purchasedmc.Value,
	    purchasedfolder.Purchasedpor.Value,
	    purchasedfolder.Purchaseds13.Value
	}
	local key = player.Name.."-"..player.UserId
	local normalData = HttpService:JSONEncode(data)
	DataStore:SetAsync(key,normalData)
end)

--Please refer to my comment on your post. (EDITED)

A workaround I can see doing is putting an intvalue/numvalue in your player for the 5 different things in your purchasedfolder.

So it would go like this inside your PlayerAdded script

player:findFirstChild("Purchasedbmw").Value  = data[1]
purchasedfolder.Purchasedbmw.Value = player:findFirstChild("Purchasedbmw").Value -- Purchasedbmw will be the number value or intvalue that you manually add in your player. I believe this will work, but please let me know if it doesn't.