When I try to add taxonomy term to multiplie products I have problem "This SKU is already in use and must be unique. Please supply another value". The conditions in which this problem appears: for the fresh installation of commerce kickstart 2.9 with sample content go to content types - shoes - category field and change settings for unlimited number of values. Then go to some shoes products and select 2 or more category. Then try to change category for this shoes via "Modify entity values" of bulk operations.
For my another site (not fresh install of commerce kickstart) on the "Modify entity values" selection page I have additional notice:
Notice: Undefined index: sku in CommerceProductInlineEntityFormController->entityForm() (line 185 of /var/www/jewel2/profiles/commerce_kickstart/modules/contrib/inline_entity_form/includes/commerce_product.inline_entity_form.inc).
Notice: Undefined index: status in CommerceProductInlineEntityFormController->entityForm() (line 204 of /var/www/jewel2/profiles/commerce_kickstart/modules/contrib/inline_entity_form/includes/commerce_product.inline_entity_form.inc).
Can you help me with multiple change category for products?