How to delete the whole item list?

[RPWunterweex]

I only modify my items within my ERP-System. This is a must, because all my orders are managed with it. So it is uncomfortable to me to modify the items within the Spread-sheet/CSV-file. The only possibility to manage this task seems to be the deletion of the whole item-list in the backoffice. And afterwards upload a fresh one. I do not need in-stock-telling and the other tools. But: how to delete them all? (It is not possible to reimport the SKU in my ERP, that´s it.)

[Amirah]

You can delete all your items from the items list, it is not possible to delete them all at once but here you can show 100 items per page and then select all and delete. Repeat the same process for the other pages

However, deleting an item and creating a new one (even with the same SKU, name, category,...etc) will result in the item been handled as a completely new item in the sales report 

Then