Hi everyone, I'm new to odoo. For my accounting entries, I do a multiple conversion on the debit, credit and balance lines for an operation carried out in a currency other than the one selected. How can I solve this?

def _get_report_vals(self, dates, entry_type, journal_id, company_id, prev_period, last_period, currency_id, fold_account_ids):
    move_lines = []
    domain = []
    compare_period = []
    if not isinstance(fold_account_ids, list):
        fold_account_ids = [int(x) for x in fold_account_ids.split(',')] if fold_account_ids else []
    if journal_id and journal_id not in ['0', 'undefined']:
        domain += [('move_id.journal_id', '=', int(journal_id))]
    if company_id and company_id not in ['0', 'undefined']:
        domain += [('move_id.company_id', '=', int(company_id))]
    if entry_type == 'all':
        domain += [('move_id.state', 'in', ['draft', 'posted'])]
    elif entry_type == 'draft':
        domain += [('move_id.state', '=', 'draft')]
    elif entry_type == 'posted':
        domain += [('move_id.state', '=', 'posted')]
    date_from, date_to = date_utils.get_month(fields.Date.context_today(self))
    string = format_date(self.env, fields.Date.to_string(date_to), date_format='MMM YYYY')
    quarter_names = get_quarter_names('abbreviated', locale=get_lang(self.env).code)
    if dates == 'this_month':
        string = format_date(self.env, fields.Date.to_string(date_to), date_format='MMM YYYY')
        domain += [('date', '>=', date_from), ('date', '<=', date_to)]
    elif dates == 'this_quarter':
        date_from, date_to = date_utils.get_quarter(fields.Date.context_today(self))
        string = u'%s\N{NO-BREAK SPACE}%s' % (quarter_names[date_utils.get_quarter_number(date_to)], date_to.year)
        domain += [('date', '>=', date_from), ('date', '<=', date_to)]
    elif dates == 'this_fin_year':
        company_fiscalyear_dates = self.env.company.compute_fiscalyear_dates(fields.Date.context_today(self))
        date_from = company_fiscalyear_dates['date_from']
        date_to = company_fiscalyear_dates['date_to']
        string = date_to.strftime('%Y')
        domain += [('date', '>=', date_from), ('date', '<=', date_to)]
    elif dates == 'last_month':
        date_from, date_to = date_utils.get_month(fields.Date.context_today(self))
        date_from = date_from - relativedelta(months=1)
        date_to = date_to - relativedelta(months=1)
        string = format_date(self.env, fields.Date.to_string(date_to), date_format='MMM YYYY')
        domain += [('date', '>=', date_from), ('date', '<=', date_to)]
    elif dates == 'last_quarter':
        date_from, date_to = date_utils.get_quarter(fields.Date.context_today(self))
        date_from = date_from - relativedelta(months=1)
        date_from, date_to = date_utils.get_quarter(date_from)
        string = u'%s\N{NO-BREAK SPACE}%s' % (quarter_names[date_utils.get_quarter_number(date_to)], date_to.year)
        domain += [('date', '>=', date_from), ('date', '<=', date_to)]
    elif dates == 'last_fin_year':
        company_fiscalyear_dates = self.env.company.compute_fiscalyear_dates(fields.Date.context_today(self))
        date_from = company_fiscalyear_dates['date_from']
        date_to = company_fiscalyear_dates['date_to']
        date_from = date_from - relativedelta(years=1)
        date_to = date_to - relativedelta(years=1)
        string = date_to.strftime('%Y')
        domain += [('date', '>=', date_from), ('date', '<=', date_to)]
    line_data = {}
    selected_currency = currency_id or self.env.company.currency_id
    if selected_currency and selected_currency not in ['0', 'undefined']:
        selected_currency = self.env['res.currency'].browse(int(selected_currency))
    else:
        selected_currency = self.env.company.currency_id
    rates_conversion = self.env['ir.config_parameter'].sudo().get_param('account_report_with_multi_currency.rates_conversion_date_selection')
    if rates_conversion == 'transaction_date':
        for mo_line in self.env['account.move.line'].search(domain, order='account_code asc'):
            if mo_line.account_id not in line_data:
                line_data[mo_line.account_id] = {}
                line_data[mo_line.account_id]['debit'] = mo_line.currency_id._convert(mo_line.debit, selected_currency, self.env.company, mo_line.date or fields.Date.context_today(self))
                line_data[mo_line.account_id]['credit'] = mo_line.currency_id._convert(mo_line.credit, selected_currency, self.env.company, mo_line.date or fields.Date.context_today(self))
                line_data[mo_line.account_id]['amount_currency'] = mo_line.currency_id._convert(mo_line.amount_currency, selected_currency, self.env.company, mo_line.date or fields.Date.context_today(self))
                line_data[mo_line.account_id]['date'] = mo_line.date
                line_data[mo_line.account_id]['partner'] = ''
                line_data[mo_line.account_id]['name'] = ''
                line_data[mo_line.account_id]['account_id'] = mo_line.account_id.id

            else:
                line_data[mo_line.account_id]['debit'] += mo_line.currency_id._convert(mo_line.debit, selected_currency, self.env.company, mo_line.date or fields.Date.context_today(self))
                line_data[mo_line.account_id]['credit'] += mo_line.currency_id._convert(mo_line.credit, selected_currency, self.env.company, mo_line.date or fields.Date.context_today(self))
                line_data[mo_line.account_id]['amount_currency'] += mo_line.currency_id._convert(mo_line.amount_currency, selected_currency, self.env.company, mo_line.date or fields.Date.context_today(self))
    else:
        for mo_line in self.env['account.move.line'].search(domain, order='account_code asc'):
            if mo_line.account_id not in line_data:
                line_data[mo_line.account_id] = {}
                line_data[mo_line.account_id]['debit'] = mo_line.currency_id._convert(mo_line.debit, selected_currency, self.env.company, date_from or fields.Date.context_today(self))
                line_data[mo_line.account_id]['credit'] = mo_line.currency_id._convert(mo_line.credit, selected_currency, self.env.company, date_from or fields.Date.context_today(self))
                line_data[mo_line.account_id]['amount_currency'] = mo_line.currency_id._convert(mo_line.amount_currency, selected_currency, self.env.company, date_from or fields.Date.context_today(self))
                line_data[mo_line.account_id]['date'] = mo_line.date
                line_data[mo_line.account_id]['partner'] = ''
                line_data[mo_line.account_id]['name'] = ''
                line_data[mo_line.account_id]['account_id'] = mo_line.account_id.id
            else:
                line_data[mo_line.account_id]['debit'] += mo_line.currency_id._convert(mo_line.debit, selected_currency, self.env.company, date_from or fields.Date.context_today(self))
                line_data[mo_line.account_id]['credit'] += mo_line.currency_id._convert(mo_line.credit, selected_currency, self.env.company, date_from or fields.Date.context_today(self))
                line_data[mo_line.account_id]['amount_currency'] += mo_line.currency_id._convert(mo_line.amount_currency, selected_currency, self.env.company, date_from or fields.Date.context_today(self))
    # line_data = self.env['account.move.line'].read_group(domain, ['account_id', 'debit', 'credit', 'date', 'partner_id', 'amount_currency', 'move_name'], ['account_id'])
    for account in line_data:
        lines = self.env['account.move.line'].search(domain + [('account_id', '=', account.id)])
        move_line_list = []
        for line in lines:
            move_line_data = {}
            move_line_data['id'] = line.id
            move_line_data['move_name'] = line.move_id.name
            move_line_data['move_id'] = line.move_id.id
            move_line_data['model'] = line.move_id._name
            move_line_data['date'] = line.date
            move_line_data['name'] = line.name
            move_line_data['partner_id'] = line.partner_id.name
            # move_line_data['is_foldernle'] = True if line.account_id.id in fold_account_ids else False
            if rates_conversion == 'transaction_date':
                move_line_data['debit'] = line.currency_id._convert(line.debit, selected_currency, self.env.company, line.date or fields.Date.context_today(self))
                move_line_data['credit'] = line.currency_id._convert(line.credit, selected_currency, self.env.company, line.date or fields.Date.context_today(self))
                move_line_data['amount_currency'] = line.currency_id._convert(line.amount_currency, selected_currency, self.env.company, line.date or fields.Date.context_today(self))
                move_line_data['total'] = line.currency_id._convert(line.debit - line.credit, selected_currency, self.env.company, line.date or fields.Date.context_today(self))
            else:
                move_line_data['debit'] = line.currency_id._convert(line.debit, selected_currency, self.env.company, date_from or fields.Date.context_today(self))
                move_line_data['credit'] = line.currency_id._convert(line.credit, selected_currency, self.env.company, date_from or fields.Date.context_today(self))
                move_line_data['amount_currency'] = line.currency_id._convert(line.amount_currency, selected_currency, self.env.company, date_from or fields.Date.context_today(self))
                move_line_data['total'] = line.currency_id._convert(line.debit - line.credit, selected_currency, self.env.company, date_from or fields.Date.context_today(self))

            move_line_list.append(move_line_data)

        partner = self.env['res.partner']
        if 'partner_id' in line_data[account]:
            partner = self.env['res.partner'].browse(line_data[account]['partner_id'][0])
        vals = {
            'name': line_data[account]['name'],
            'account': account.display_name,
            'debit': line_data[account]['debit'],
            'credit': line_data[account]['credit'],
            'amount_currency': line_data[account]['amount_currency'],
            'date': line_data[account]['date'],
            'partner': partner.display_name,
            'lines': move_line_list,
            'account_id': account.id,
            'model': "account.move.line"
        }
        move_lines.append(vals)
    # currency_id = self.env.company.currency_id
    return {
        'move_lines': move_lines,
        'string': string,
        'report_currency_id': selected_currency,
        'currency_id': selected_currency.id,
        'compare_period': compare_period,
        'fold_account_ids': fold_account_ids if fold_account_ids else []
    }