Hello,
I added two columns to the list of commands in the backoffice carrier and city (I created an override of the __construct () method of controller AdminOrderController.php )
Everything works well.
After the migration of PrestaShop( 1.6.0.11 to 1.6.1.6) the two columns don't appear in the backoffice command list.
I emptied the cache nothing changed.
I deleted the file class_index.php, both columns have appeared in the command list , but after some time they disappear.
Can you please help me to solve this problem?