Prestashop 1.6 - Duplicate id_order

[walidkira]

How can i duplicate id_order  ( two or order with same id) ???

Or how c i Reset order number at the start of the year

 

Please help :/ 

[walidkira]

in prestashop 1.6 we can reset invoice number but i want also reset order number ( id_order cannot be duplicate) 
and with auto-increment we Only can start with the last number
there's a solution to start auto-increment 1 ?? if i have for exemple 
id_order=100
id_order=101
....
id_order=300