Hello,
Your product have variants.
Each of these variant got a product code and when you select the characteristics, the variant is changing that it's the variant product which is displayed in the page.
If you do not want to display the variant product code ; the best would be to perform a override of the page "product / show" to change how the generation of the variant product is done (do not perform that generation OR display the main product code instead).
www.hikashop.com/support/documentation/1...-display.html#layout
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.