Error Code 8567
This is caused because Parent items do not have a Product ID. If you are trying to connect with Fast Listing, this error means that you are connecting to an already existing ASIN and so, Parent IDs do not have a Product ID. It means that the Parent doesn’t match any ASINs. As Parent Products do not have a Product ID. Amazon recognizes it as null (empty). Fast Listing will be disabled in this case.
Disable Fast Listing mode for the product and send force-update as product data.
Then, sync your Amazon Channel.