feed import module: is it possible to have a feed importer without unique field I'm using Commerce Kickstart 2.

The SKU field of my products is automatically generated in relation with a serial field that I've created (Serial field module). That was done with the appropriate token generated with the serial field attached to automatic SKU generation. So I want to import my products with Feed Import module without to have a unique field configured, because the SKU will be automatically generated.

Is it possible to setup a feed importer without unique field?

Sorry about my bad English.
Check out Feed Tamper module. It allows you to modify the imported data before it is saved. For example, you can specify a token as the default value for the field or add a placeholder which then you can replace when you generate SKU.