When specifying SKU for InventoryTrackingMethod, the SKU must be unique within your active and scheduled listings
Review When specifying SKU for InventoryTrackingMethod, the SKU must be unique
Internal only.
Seller facing FAQ is this one. Recently updated.
https://support.omnivore.com.au/ebay-error-sku-must-be-unique-for-active-listings
Error - When specifying SKU for InventoryTrackingMethod, the SKU must be unique within your active and scheduled listings
As of March 2024 due to the result of this ticket ( https://citybeachsoftware.freshdesk.com/a/tickets/135901 ), this error is under investigation by Steve who has an open DTS case with eBay Dev.
Steve is identifying the scenarios that cause this error. One known scenario is that Omnivore duplicated the listings which results in listings being removed with this error. As the case in 135901. A fix has been applied for this.
Snowys have this error at present, investigation is with eBay Dev/Steve.
If you get a ticket with this error and the external FAQ does not remedy the issue please let Steve know so he can look at it case by case. Steve is trying to rule out the instances where this error occurs so we know when its Omnivore or eBay.