packs : pack data fields

-- HikaShop version -- : 2.3.2
-- HikaSerial version -- : 1.8.3
-- Joomla version -- : 2.5.22
-- PHP version -- : 5.3.9
-- Browser(s) name and version -- : many many

the available documentation acessible from the BE show this information for pack data

2) in this post we learn that
"- I removed the "pack data - sql" from your pack because you want to generate dynamically the serial depending the product."
Does this mean we don't have to click on generate icon for create the serial value in packs ?
It is during buyer payment session that the creation of the serial occur ?

regard's