I am using multi-store, obviously products name same, when i edit product i am getting product unique name error,
For this issue how to disable Magento 2.3 validation temporarily.
I am using Magento 2.3.1 and for me, the product name is not unique by default, you can check if you are able to change it from admin in :
Store > Attributes > Product > Edit Name Attribute
if you are not able to change the property of attribute to non-unique, you can run database query like below :
UPDATE 'eav_attribute' SET is_unique = 0 WHERE `entity_type_id` = 4 and `attribute_code` like 'name'
Hope it helps !