Hello.
I successfully managed the manual migration from PS 1.6.1.24 to PS 8.1.5
I followed this topic which is very useful and precise : https://devdocs.prestashop-project.org/8/basics/keeping-up-to-date/migration/
I just got one issue :
Displaying the orders list in the admin panel is very slow. It takes around 30 seconds to display (database contain 35,000 orders).
With debug mode, it seems that one SQL query takes a long time to execute, as you can see in the screenshots.
I am not an expert in SQL, so I do not know how to solve this problem 😕
Has anyone ever had this problem? Many thanks.