Solved MYSQL Duplicate Entry

So I have this code for my database, the first time around for creating the player it works great! But when I log out and try to log back in it tries to create another entry, thus giving a duplicate error entry. Which was is wrong in the piece of code.

Code:

package dae.stafftools.MYSQL;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

import org.bukkit.entity.Player;

import dae.stafftools.Main;
import dae.stafftools.tools.core.SettingsManager;

public class UserData {
    public static boolean playerExists(String uuid) {
        SettingsManager settings = SettingsManager.getInstance();

        try {
            Statement statement = Main.c.createStatement();
            ResultSet rs = statement
                    .executeQuery("SELECT * FROM "+ settings.getConfig().getString("Server.Server_Name") + " WHERE UUID= '"
                            + uuid + "';");
            rs.next();
            if (rs.next()) {
                return rs.getString("UUID") != null;
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return false;
    }

    public static void createPlayer(String uuid, Player player) {
        SettingsManager settings = SettingsManager.getInstance();

        if (!(playerExists(uuid))) {
            try {
                Statement statement = Main.c.createStatement();
                statement.executeUpdate("INSERT INTO "+ settings.getConfig().getString("Server.Server_Name") + " (UUID, Player_Name,DAYS,HOURS,MINUTES, SECONDS) VALUES ('"+ uuid+ "', '" + player.getName() + "', '0', '0', '0', '0');");
                System.out.println("Inserted info for:" + uuid);
            } catch (SQLException e) {
                e.printStackTrace();
            }

        }
    }

}