Message SOME_PRODUCTS_REQUIRED_SERIAL_IN_SESSION

-- HikaShop version -- : 3.1.1
-- HikaSerial version -- : 2.0.0
-- Joomla version -- : 3.7.3
-- PHP version -- : 5.7
-- Browser(s) name and version -- : Google Chrome Version 59.0.3071.115 (Official Build) (64-bit)

If I attempt to Finish buying a product without using the required Serial, I get this message:

Message
SOME_PRODUCTS_REQUIRED_SERIAL_IN_SESSION

I was not able to find this in either of the language files.

Hello,

Thanks for the report.
For the moment, please add the missing translation in your override language file.

Regards,