Hi Acumatica Community,
I’ve set up an import scenario to handle contact records using a CSV file exported from Shopify.
The goal is to either update an existing contact (based on the email) or create a new one if the contact doesn’t exist.

However, I’m encountering an issue where the scenario always creates new contacts, even if a matching email with the contact exists in the system.
I am using <Key: External> in the first row. My understanding is that this is used to identify records in the system, but it does not look like the whole import is updating any existing contact at all, instead, creating new ones.
Is there something wrong with how I’ve configured the <Key: External> mapping or could there be another setting or mapping I’m overlooking that might cause this issue?
Any help would be really appreciated!
Will