Total items canceled

-- HikaShop version -- : Essential 3.0.1
-- Joomla version -- : 3.6.5
-- PHP version -- : 5.6.23\
-- Browser(s) name and version -- : firefoz

Hello,
I have the following problem.
For a customer need, the item numbers change with each update of the Hika store database. I load them through CSV management. I wanted to know if there is an option that allows me to delete all items before recharging via CSV.
Thanks for your cooperation.

hello and thank you for your prompt response.
I configured a process and I am attaching as an afterimage.
This means :
delete all items before creating the FIRST article.
The cancellation occurs once or is performed at each new article loaded?
It is automatically run when I run the import from CSV?

Thanks for your cooperation.