I've been using module Multi-Supplier Purchase Requisition to generate PR. Everything work fine, unless that I don't want field description in purchase.requisition be auto generated to the notes field in purchase.order object after confirm create quotation.

I've been tried modified some code, but it doesn't seem right. Now, I don't have any idea anymore. Could you please suggest some approaches?

Here's what I modified the code at purchase_requisition.py in folder purchase_requisition. I commented out the line that seems to create a notes field in the make_purchase_order method but it doesn't work:

def make_purchase_order(self, cr, uid, ids, partner_id, context=None):
        """
        Create New RFQ for Supplier
        """
        if context is None:
            context = {}
        assert partner_id, 'Supplier should be specified'
        purchase_order = self.pool.get('purchase.order')
        purchase_order_line = self.pool.get('purchase.order.line')
        res_partner = self.pool.get('res.partner')
        fiscal_position = self.pool.get('account.fiscal.position')
        supplier = res_partner.browse(cr, uid, partner_id, context=context)
        supplier_pricelist = supplier.property_product_pricelist_purchase or False
        res = {}
        for requisition in self.browse(cr, uid, ids, context=context):
            if supplier.id in filter(lambda x: x, [rfq.state <> 'cancel' and rfq.partner_id.id or None for rfq in requisition.purchase_ids]):
                 raise osv.except_osv(_('Warning!'), _('You have already one %s purchase order for this partner, you must cancel this purchase order to create a new quotation.') % rfq.state)
            location_id = requisition.warehouse_id.lot_input_id.id
            purchase_id = purchase_order.create(cr, uid, {
                        'origin': requisition.name,
                        'partner_id': supplier.id,
                        'pricelist_id': supplier_pricelist.id,
                        'location_id': location_id,
                        'company_id': requisition.company_id.id,
                        'fiscal_position': supplier.property_account_position and supplier.property_account_position.id or False,
                        'requisition_id':requisition.id,
                        # 'notes':requisition.description,
                        'warehouse_id':requisition.warehouse_id.id,
            })
            res[requisition.id] = purchase_id
            for line in requisition.line_ids:
                product = line.product_id
                seller_price, qty, default_uom_po_id, date_planned = self._seller_details(cr, uid, line, supplier, context=context)
                taxes_ids = product.supplier_taxes_id
                taxes = fiscal_position.map_tax(cr, uid, supplier.property_account_position, taxes_ids)
                purchase_order_line.create(cr, uid, {
                    'order_id': purchase_id,
                    'name': product.partner_ref,
                    'product_qty': qty,
                    'product_id': product.id,
                    'product_uom': default_uom_po_id,
                    'price_unit': seller_price,
                    'date_planned': date_planned,
                    'taxes_id': [(6, 0, taxes)],
                }, context=context)

        return res