Hello,
As Nicolas explained ; you should use the exact same package in the two websites.
Same packages means the same version number but also the same edition of HikaShop.
Because, if you migrate an HikaShop Essential on an HikaShop Business ; the Business feature will be deactivated when copying the database.
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.