[HELP] Restrict Forgotten Skills on Stackable Subs Patch

hi guys i have this code i found on the forum that will stack only active skill from the characters subclasses:

         try
        {
           boolean isAcumulative = Config.ACUMULATIVE_SUBCLASS_SKILLS;
  
           // Retrieve all skills of this L2PcInstance from the database
           con = L2DatabaseFactory.getInstance().getConnection();
           PreparedStatement statement = con.prepareStatement(isAcumulative ? ACUMULATE_SKILLS_FOR_CHAR_SUB : RESTORE_SKILLS_FOR_CHAR);
           
           statement.setInt(1, getObjectId());
              if (!isAcumulative)
              statement.setInt(2, getClassIndex());
           ResultSet rset = statement.executeQuery();

            // Go though the recordset of this SQL query
            while (rset.next())
            {
                int id = rset.getInt("skill_id");
                int level = rset.getInt("skill_level");
               int classindex = rset.getInt("class_index");

                if (id > 9000 && id < 9007)
                    continue; // fake skills for base stats

	 // Create a L2Skill object for each record
	 L2Skill skill = SkillTable.getInstance().getInfo(id, level);

               //check if it is passive and now of our class
               if (skill.isPassive() && classindex != getClassIndex() )
                   continue;

	 // Add the L2Skill object to the L2Character _skills and its Func objects to the calculator set of the L2Character
	 super.addSkill(skill);

but i want to add some code that will restrict forgotten skills from accumulating so the characters will have only forgoten skills of their respective classes.

forgotten skills are learned at lvl 81 and lvl 83 so maybe if we put something that checks if the skill is learned at lvl80 or higher not acumulate it.

could someone help me with this? thanks!