The write function is not updating while raising an error

    @api.model    
    def create(self,vals):
        record = self.search([('create_uid', '=', self.env.user.id), ('purchase_order_type', '=', 'po_type_local'), ('state', 'not in', ['sent', 'draft'])])                
        for rec in record:
            d1 = datetime.strptime(rec.date_order, '%Y-%m-%d %H:%M:%S')            
            d2 = datetime.strptime(fields.Date.today(), '%Y-%m-%d')            
            d3 = fields.Date.today()            
            daysDiff = str((d2-d1).days+1)
                if self.env.user.lpo_extend < d3:
                    if int(daysDiff) > 2:
                        if rec.invoice_count == 0:
                            self.env.user.write({'lpo_block': True})                       
                            raise UserError("You cannot create this order! Previous LPO is not processed yet!")            
                count = 0            
                if self.env.user.lpo_extend < d3:
                    for line in rec.invoice_ids:
                        if line.state != 'draft':
                            count += 1                
                    if int(daysDiff) > 2:
                        if count == 0:
                            self.env.user.write({'lpo_block': True})                       
                            raise UserError("You cannot create this order! Previous LPO is not processed yet!")       
        return super(PurchaseOrder, self).create(vals)