CSV Import error

-- HikaShop version -- : 4.0.3
-- Joomla version -- : 3.9.4
-- PHP version -- : 7.2
-- Error-message(debug-mod must be tuned on) -- : none

Hi
Ive been trying out the csv export import / preparing for a large quantity of new stock arriving.

I have created 2 products in 2 x categories in hikashop, then exported them.
I deleted everything in hikashop and then imported the previously exported csv file.

The products and categories appear fine. However, I getthis error message which I dont understand why
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Notice
The line '"","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","product category","","","","","","","","","","",""' could not be imported Product not found
The line '"","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","product category","","Category 1","","","","","","","","","","",""' could not be imported Product not found
The line '"","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","product category","","CATegory 2","","","","","","","","","","",""' could not be imported Product not found
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ok, thanks nicolas, best to check..