v6.15.1

Common: [Fixed] Log "Magento Product does not exist" keeps appearing for old Channel orders [#2591]
eBay: [Fixed] Warning "A shipping rate table ID is already applied to the listing" when trying to revise Products that have Shipping Rate Tables disabled [#2987]
eBay: [Fixed] Internal Server Error(s) [Please specify item_id for revise] due to eBay item ID equal to 0 in the Listing grid [#3017]
Amazon: [Improved] Throttling limits of the command GET_AMAZON_FULFILLED_SHIPMENTS_DATA [#3055]