i have a field grade_ids one2many with a model student.subject.grade
i want in method write  in model (student.stage.history) create a
history student for a education_estate 
i want when a change eductaion_estate create in model  (student.stage.history) a grade_ids but after  create put old_grade in archive but save old_grade in history before archive

grade_ids = fields.One2many(
            'student.subject.grade', 'student_id',
domain="[('education_stage', '=', education_stage)]",
string='Grades', tracking=True)


@api.model
def write(self, vals):


    # if 'grade_ids' in vals:

   
        if 'education_stage' in vals:
            old_stage = student.education_stage
            old_stage_label = dict(self._fields['education_stage'].selection).get(old_stage)

            new_stage = vals.get('education_stage')  

old_subjects = self.env['school.subject'].search(
        [('education_stage', '=', student.education_stage)])

            new_subjects = self.env['school.subject'].search(
                    [('education_stage', '=', new_stage)]  

            old_grades = student.grade_ids.filtered(lambda g: g.education_stage == old_stage)
            # print("Old Grades:", old_grades)   old_grades

            if old_grades:
                
                history_record = self.env['student.stage.history'].create(
                        {
                                'student_id'     : student.id,
                                'old_stage'      : old_stage_label,
                                'education_stage': new_stage,
                                'date'           : fields.Datetime.now(),
                                'grade_ids'      : [(6, 0, old_grades.ids)],  
                                'old_subject_ids': [(6, 0, student.grade_ids.mapped('subject_id.id'))],  
                                # 'old_subject_ids': [(6, 0, old_subjects.ids)]  
                                # 'new_subject_ids': [(6, 0, new_subjects.ids)],  
                        }
                )
                
                old_grades.write({'active': False})

    res = super(SchoolStudent, self).write(vals)
    return res 

my code this he create a model history but old grade dont visible in history