Having a problem with loading an entity when the player leave the server

Hello, im working on a small project which can spawn a small floating lootbox on a hidden armor stand, but i faced an issue when the player leave the server and reconect the lootbox disappear, and will not spawn again on the place where i used the command to spawn it
REMARK: the lootbox respawn every 15s when a player right click it + there is 3 type of it https://prnt.sc/20xomn7

here the code i use to spawn the lootbox

Code:

    public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) {
        if (!(sender instanceof Player)) {
            sender.sendMessage("Only players command.");
            return true;
        }
        Player p = (Player)sender;
        if(p.hasPermission("lootbox.create")) {
            if (args.length == 0) {
                p.sendMessage(ChatColor.translateAlternateColorCodes
                        ('&',"&c[!] &7Usage &c/lootbox help"));
            } else {
                if (args[0].equals("help")) {
                    sender.sendMessage(ChatColor.translateAlternateColorCodes
                            ('&',"&8- &b/LootBox Create &8- &7To create a random lootbox"));
                    sender.sendMessage(ChatColor.translateAlternateColorCodes
                            ('&',"&8- &b/LootBox Remove &8- &7To remove a lootbox"));
                }
                if (args[0].equals("remove")) {
                    ItemStack remover = new ItemStack(Material.BLAZE_ROD);
                    ItemMeta Mremover = remover.getItemMeta();
                    Mremover.setDisplayName(ChatColor.translateAlternateColorCodes
                            ('&',"&cLootBox Remover"));
                    remover.setItemMeta(Mremover);
                    p.getInventory().addItem(remover);
                    p.sendMessage(ChatColor.translateAlternateColorCodes
                            ('&',"&a[!] &7Click a lootbox to remove it."));
                }
                if (args[0].equals("create")) {
                    List<String> messages = Main.Instance.getConfig().getStringList("Type");
                    Random random = new Random();
                    int index = random.nextInt(messages.size());
                    if ((messages.get(index)).equals("Epic"))
                        CreateEpic(p);
                    if ((messages.get(index)).equals("Rare"))
                        CreateRare(p);
                    if ((messages.get(index)).equals("Common"))
                        CreateCommon(p);
                }
            }
        } else {
            p.sendMessage(ChatColor.translateAlternateColorCodes
                    ('&', Main.Instance.getConfig().getString("Messages.NoPerms")));
        }
        return true;
    }
    private Object CreateCommon(Player p) {
        ItemStack skull = new ItemStack(Material.SKULL_ITEM, 1, (short) SkullType.PLAYER.ordinal());
        SkullMeta meta = (SkullMeta)skull.getItemMeta();
        meta.setOwner("ZeroGravityMC");
        skull.setItemMeta(meta);
        World w = p.getWorld();
        double x = p.getLocation().getX();
        double y = p.getLocation().getY() - 1.0D;
        double z = p.getLocation().getZ();
        Location loccommon = new Location(w, x, y, z);
        ArmorStand holo = (ArmorStand)p.getWorld().spawnEntity(loccommon, EntityType.ARMOR_STAND);
        holo.setVisible(false);
        holo.setGravity(false);
        holo.setHelmet(skull);
        holo.setCustomNameVisible(true);
        holo.setCustomName(ChatColor.translateAlternateColorCodes
                ('&',"&aCommon"));
        rooling(loccommon, holo);
        return null;
    }
    private Object CreateRare(Player p) {
        ItemStack skull = new ItemStack(Material.SKULL_ITEM, 1, (short)SkullType.PLAYER.ordinal());
        SkullMeta meta = (SkullMeta)skull.getItemMeta();
        meta.setOwner("Reziel");
        skull.setItemMeta(meta);
        World w = p.getWorld();
        double x = p.getLocation().getX();
        double y = p.getLocation().getY() - 1.0D;
        double z = p.getLocation().getZ();
        Location locrare = new Location(w, x, y, z);
        ArmorStand holo = (ArmorStand)p.getWorld().spawnEntity(locrare, EntityType.ARMOR_STAND);
        holo.setVisible(false);
        holo.setGravity(false);
        holo.setHelmet(skull);
        holo.setCustomNameVisible(true);
        holo.setCustomName(ChatColor.translateAlternateColorCodes
                ('&',"&9Rare"));
        rooling(locrare, holo);
        return null;
    }
    private Object CreateEpic(Player p) {
        ItemStack skull = new ItemStack(Material.SKULL_ITEM, 1, (short)SkullType.PLAYER.ordinal());
        SkullMeta meta = (SkullMeta)skull.getItemMeta();
        meta.setOwner("XxAltha4xX");
        skull.setItemMeta(meta);
        World w = p.getWorld();
        ArrayList<ArmorStand> normal = new ArrayList<>();
        double x = p.getLocation().getX();
        double y = p.getLocation().getY() - 1.0D;
        double z = p.getLocation().getZ();
        Location locepic = new Location(w, x, y, z);
        ArmorStand holo = (ArmorStand)p.getWorld().spawnEntity(locepic, EntityType.ARMOR_STAND);
        normal.add(holo);
        holo.setVisible(false);
        holo.setGravity(false);
        holo.setHelmet(skull);
        holo.setCustomNameVisible(true);
        holo.setCustomName(ChatColor.translateAlternateColorCodes
                ('&',"&5Epic"));
        rooling(locepic, holo);
        return null;
    }
    public void rooling(Location loc, final ArmorStand holo) {
        Bukkit.getScheduler().scheduleSyncRepeatingTask(Main.Instance, new Runnable() {
            public void run() {
                holo.setHeadPose(holo.getHeadPose().add(0.0D, 0.1D, 0.0D));
            }
        },0L, 1L);
    }
}

im looking for when i run the command /lootbox create it will save the location of that lootbox in a data.yml

EDIT by Moderator: merged posts, please use the edit button instead of double posting.