Hi there,
Thank you for reaching out about Product SKU Generator for WooCommerce. I’m happy to help out here and apologize for the delay in responding to you! We are reviewing internal processes to help with this in the future.
If you would like to exclude SKU generation for variations of a product, you can do so by going to WooCommerce > Settings > Products > Product SKUs > and then change the setting “Generate Variation SKUs” to “Never (Let me set them)”.
Please let me know if you have any other questions or concerns!
Best,
Zach from SkyVerge