reset the number of invoice

-- HikaShop version -- : 2.6.4
-- Joomla version -- : 3.6.4

Hello
I need to reset the number of invoice before put online the website.
Can you tell me how to do please

Thanks
Frank

To be honest I did already the search and following the old topic I did wrong couse I deleted instead of truncate.
Now you suggest me the same topic so I did the truncate and it works well

Sorry and thanks
Frank

Hello other question about a single ordert test
About the invoices, If I do a test order and it is order number and invoice number is 7, when I delete it the number of the next order and invoice will be 8, but it is important that the number of next order and invioce were 7 again.
How can I do that?? By dbase or can I do by back-end?
Other question, Can I make difference between order number and invoice number?
Example:
Order number is 8
Invoice number A8
How can I do that, I tryed to add the A before {order_id} but with no results

about the second question for number invoice different from number order, I try to use this format:
Formato Numero Ordine: {automatic_code}
Formato numero fattura: A{id}
But same, in the invoice the number is the same of the order

THanks
Frank

ok I FOund the solution for everything.
The problem was That I didn't set the Invoice order statuses.
Thanks
Frank