WooCommerce CSV Import Fix

I’m looking for someone who truly understands the WooCommerce “All in One Import” (WP All Import) workflow. I have several CSV files containing variable products; every row already carries all the required attributes and variations. The problem is that each time I run an import, new duplicate products appear instead of the existing listings being updated.

Here’s what I need you to do:

• Prepare one clean import of my current CSV so every variable product lands in the catalog once, with all its variations intact.
• Configure the import template to recognise a reliable unique identifier—SKU, ID, or another field you advise—so future uploads will update existing products rather than create copies.
• Show me, step-by-step, which settings you adjusted inside WP All Import (mapping, record matching, variation handling, etc.) so I can repeat the process confidently on my own.

I have full FTP and WordPress admin access ready for you, plus the CSV files. Once the store reflects just one instance of each product and the import template is locked in, the job is done.