Removing an object from scoreboard and replacing it with new objective

I've been trying to make my scoreboard more organized so I decided to put the scores at a standard amount that don't change and put the changing numbers in the objective's title. Every time the number changes however, the objective duplicates. How would I remove the old objective and replace it with the new objective?
Here is the code:

Code:

String levels = ChatColor.DARK_GRAY + "[" + ChatColor.GOLD + "Levels" + ChatColor.DARK_GRAY + "] ";
    @EventHandler
    public void onJoin(PlayerJoinEvent event) {

        Player player = event.getPlayer();

        String name = player.getName();

        ScoreboardManager manager = Bukkit.getScoreboardManager();
        Scoreboard board = manager.getNewScoreboard();

        Objective objective = board.registerNewObjective("test", "dummy");

        objective.setDisplaySlot(DisplaySlot.SIDEBAR);
       
        if(player.getName().length() >= 32) {
        objective.setDisplayName(ChatColor.RED + "KitPVP");   
        } else {
        objective.setDisplayName(ChatColor.RED + "KitPVP " + ChatColor.GRAY + "(" + ChatColor.GRAY + player.getName() + ChatColor.GRAY + ")");
        }
       
        if(!getConfig().contains(name)) {

            getConfig().set(name + ".kills", 0);
            getConfig().set(name + ".deaths", 0);

            getConfig().set(name + ".points", 0);
            getConfig().set(name + ".level", 0);
            saveConfig();
        }

        int kills1 = getConfig().getInt(name + ".kills");           
        int deaths1 = getConfig().getInt(name + ".deaths");

        int level = getConfig().getInt(name + ".level");
        int points = getConfig().getInt(name + ".points");
        int until = points - 10;
        until = until - until*2;
       
        int kdr = (Math.round(kills1/deaths1));

        Score levelsb = objective.getScore(ChatColor.GREEN + "Level: " + level);
        levelsb.setScore(5);

        Score line1 = objective.getScore(ChatColor.LIGHT_PURPLE + "=-=-=-=-=-=-=-=-=-=-=-=");
        line1.setScore(3);
       
        Score line2 = objective.getScore(ChatColor.LIGHT_PURPLE + "=-=-=-=-=-=-=-=-=-=-=-=");
        line2.setScore(6);

        Score ratio = objective.getScore(ChatColor.GREEN + "K.D. Ratio: " + kdr);
        ratio.setScore(2);

        Score kills = objective.getScore(ChatColor.GREEN + "Kills: " + kills1);
        kills.setScore(1);

        Score deaths = objective.getScore(ChatColor.RED + "Deaths: " + deaths1);
        deaths.setScore(0);

        Score pointsb = objective.getScore(ChatColor.AQUA + "Points Needed to Level-Up: " + until);
        pointsb.setScore(4);

        player.setScoreboard(board);
    }

I have two other classes that are pretty much similar. One is on move and the other is on kill. Expect it's not setting the config number to 0. It's adding 1 in the on death one. The on move just makes the scoreboard update. That's besides the point.

 

@plisov

1. Get all the entries by using Scoreboard#getEntries
2. Use a For-each loop for all the entries.
3. Using Scoreboard#getScore(), find the score for each entry. If that score is equal to the one you want to remove, remove it using ScoreBoard#resetScores() and break out of the for loop.