My data store manager is mixing up data stores with other players

Help and Feedback Code Review
#1

I was testing my game with a friend and when we joined the game for the second time, his data mixed up with mine (he had the same stats as me), I’m 99% sure that this script is the culprit. I didn’t put this in #help-and-feedback:scripting-support category because this code is a bit messy and it’s hard to find the problem

local DataStoreService = game:GetService("DataStoreService")
local datastore = DataStoreService:GetDataStore("AllData")
local Players = game:GetService("Players")

Players.PlayerAdded:Connect(function(player)
	local leaderstats = Instance.new("Folder")
	leaderstats.Parent = player
	leaderstats.Name = "leaderstats"
	
	local ObbiesBeaten = Instance.new("IntValue")
	ObbiesBeaten.Parent = leaderstats
	ObbiesBeaten.Name = "Obbies Beaten"
	
	local playerData = Instance.new("Folder")
	playerData.Parent = player
	playerData.Name = "playerData"
	
	local playerDataIntContent = {"se", "e", "m", "h", "i", "nm"}
	
	

	local allData

	local success, err = pcall(function()
		allData = datastore:GetAsync(player.UserId)
	end)
	
	if allData == nil then
		allData = {
			["ObbiesBeaten"] = 0;
			["se"] = 0;
			["e"] = 0;
			["m"] = 0;
			["h"] = 0;
			["i"] = 0;
			["nm"] = 0;
			["firstjAccountAge"] = player.AccountAge
		}
	end
	
	for _, value in ipairs(playerDataIntContent) do
		local container = Instance.new("IntValue")
		container.Parent = playerData
		container.Value = allData[value]
		container.Name = value
		
		container.Changed:Connect(function(newValue)
			allData[value] = newValue
		end)
	end

	ObbiesBeaten.Value = allData["ObbiesBeaten"]
	
	ObbiesBeaten.Changed:Connect(function(newValue)
		allData["ObbiesBeaten"] = newValue
	end)
	
	Players.PlayerRemoving:Connect(function(player)
		local success, err = pcall(function()
			datastore:SetAsync(player.UserId, allData)
		end)
	end)

	game:BindToClose(function()
		local success, err = pcall(function()
			datastore:SetAsync(player.UserId, allData)
		end)
	end)
end)
My data store manager is mixing up data stores with other players