datastore mixing up data issue?

basically whenever two people join the game at the same time (only when its at the same time) they will both have the same data picked from one of the two users rather than individual users

local returned, returneddata = pcall(function()
local datastore = game:GetService("DataStoreService")
local cashdata = datastore:GetDataStore("cash3-datastore-string")
local currentbackpackdata = datastore:GetDataStore("currentbackpackstorage4-datastore-string")
local ownedbackpackdata = datastore:GetDataStore("backpackowned4-datastore-string")
local ownedbackpackstoragedata = datastore:GetDataStore("backpackownedstorage4-datastore-string")
local currenttooldata = datastore:GetDataStore("currentownedtool5-datastore-string")
local rebirthsdata = datastore:GetDataStore("rebirthsdata5-datastore-string")


game.Players.PlayerAdded:Connect(function(player)
    local Data = Instance.new("Folder",player)
    Data.Name = "leaderstats"

    local cash = Instance.new("IntValue",Data)
    cash.Name = "Gold"
    cash.Value = cashdata:GetAsync(player.UserId) or 0

    local nonleaderstats = Instance.new("Folder",player)
    nonleaderstats.Name = "nonleaderstats"

    local currentbackpack = Instance.new("IntValue",nonleaderstats)
    currentbackpack.Name = "CurrentBackpack"
    currentbackpack.Value = currentbackpackdata:GetAsync(player.UserId) or 0

    local ownedbackpack = Instance.new("StringValue",nonleaderstats)
    ownedbackpack.Name = "OwnedBackpack"
    ownedbackpack.Value = ownedbackpackdata:GetAsync(player.UserId) or "Default"

    local ownedbackpackstorage = Instance.new("IntValue",nonleaderstats)
    ownedbackpackstorage.Name = "OwnedBackpackStorage"
    ownedbackpackstorage.Value = ownedbackpackstoragedata:GetAsync(player.UserId) or 25

    local currenttool = Instance.new("StringValue",nonleaderstats)
    currenttool.Name = "CurrentTool"
    currenttool.Value = currenttooldata:GetAsync(player.UserId) or "Gold Nugget"

    local rebirths = Instance.new("IntValue", Data)
    rebirths.Name = "Rebirths"
    rebirths.Value = rebirthsdata:GetAsync(player.UserId) or 0

    game.Players.PlayerRemoving:Connect(function(player)
        cashdata:SetAsync(player.UserId, cash.Value)
        currentbackpackdata:SetAsync(player.UserId, currentbackpack.Value)
        ownedbackpackdata:SetAsync(player.UserId, ownedbackpack.Value)
        ownedbackpackstoragedata:SetAsync(player.UserId, ownedbackpackstorage.Value)
        currenttooldata:SetAsync(player.UserId, currenttool.Value)
        rebirthsdata:SetAsync(player.UserId, rebirths.Value)
    end)

    while wait(120) do -- Auto Save
        cashdata:SetAsync(player.UserId, cash.Value)
        currentbackpackdata:SetAsync(player.UserId, currentbackpack.Value)
        ownedbackpackdata:SetAsync(player.UserId, ownedbackpack.Value)
        ownedbackpackstoragedata:SetAsync(player.UserId, ownedbackpackstorage.Value)
        currenttooldata:SetAsync(player.UserId, currenttool.Value)
        rebirthsdata:SetAsync(player.UserId, rebirths.Value)
    end
end)
end)
print(returned, returneddata)