Hi,
For the HikaShop product edition form, you will have to edit the view "product | form" of your backend template via the menu Display > Views.
For the HikaMarket product edition, you can modify the default access rights for the product edition. A forbidden field won't be displayed by HikaMarket.
Otherwise you can override the view "productmarket | form" of your front-end template.
By using view overrides, you won't loose your changes when you update.
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.