Display the recently viewed items

-- HikaShop version -- : 2.6.4
-- Joomla version -- : 3.6.4
-- PHP version -- : 7.0.15
-- Browser(s) name and version -- : Chrome 56.02
-- Error-message(debug-mod must be tuned on) -- : none

I use module to display the recently viewed items,
But it seem whole site recently
A user see item 1,
and B user's list show item 1 too.

my setting is attachments

please help turboshooting

thanks