When you save item error

-- HikaShop version -- : 2.6.0 business
-- Joomla version -- : 3.48

When you save item error :
1062 Duplicate entry '' for key 'product_code' SQL=UPDATE `kytrq_hikashop_product` SET `product_name`='Наборы весом 100 грамм.(9 тресс)',`product_code`='',`product_quantity`='-1',`product_manufacturer_id`='44',`product_published`='1',`product_tax_id`='11',`product_msrp`='0.0000000',`product_page_title`='',`product_url`='',`product_meta_description`='',`product_keywords`='Волосы купить,волосы на заколках,',`product_alias`='Naboryi-vesom-100',`product_canonical`='',`product_min_per_order`='0',`product_max_per_order`='0',`product_sale_start`='',`product_sale_end`='',`product_access`='all',`product_warehouse_id`='',`product_weight`='100.000',`product_weight_unit`='g',`product_length`='0.000',`product_width`='0.000',`product_height`='0.000',`product_dimension_unit`='m',`product_layout`='',`product_quantity_layout`='',`product_group_after_purchase`='',`product_type`='main',`product_description`='<p><strong>',`product_modified`='1453935546' WHERE `product_id`='3048'

and gone to all the products that I filled , what to do?! Make OpenServer!please help!
What's the problem?!

nicolas wrote: Hi,

It means that there is no product code in the product you're trying to save. Please make sure that you have the product code field of the product filled before saving or it won't work as that is a required field.

Hi,

We can't leave that field empty, HikaShop is doing a lot of work based on these product codes.
But once filled, you will no more have errors, and in Configuration > Display > Product you can disable the option to show the product code. That way it will never appear on frontend.

Xavier wrote: Hi,

We can't leave that field empty, HikaShop is doing a lot of work based on these product codes.
But once filled, you will no more have errors, and in Configuration > Display > Product you can disable the option to show the product code. That way it will never appear on frontend.