[Minor] fix in the item for the function make_variant_item_code

[manassolanki]

Fix for the issue #9279

[ShehataGhattas]

Dear,
I have seen the fixing point i have change it manually, but its took me to another one its requesting for the item code and i have make the stock setting the Item Naming By naming series

Error for row (#21) : {"message": "Item Code is required", "indicator": "red"}