Hello,

Where you have paid? If you have bought credit on this site, then you should open ticket. **_Tickets are private._**

Please avoid duplication. You already have question there is no need to ask again.

Thank you

check this receipt.

done. created ticket

hello sir,

we need help from you to make primary key for reference number. because same facture reference number updating twice. please make change that.

same facture keep repeating from staff. we have to make error message if twice update same reference number facture

Hello,

Reference number is not validated against uniqueness as it's manual input. You can add new validation rule for reference `is_unique[sales.reference_no]` and the full line would be

```php
$this->form_validation->set_rules('reference_no', $this->lang->line('reference_no'), 'required|is_unique[sales.reference_no]');
```

in the sales controller `app/controllers/Sales.php`

Thank you