Hello,
Please provide details about the version numbers and also more details about the context.
Which "registration" are you talking about exactly ?
It could be a lot of things, Joomla, third party component, HikaShop user registration, HikaShop checkout registration, etc.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.