Sitecore Docs - Tech Tips by GS

 If you have used Data Exchange Framework with Sitecore, you would be familiar with the concept of Queues and Queue Processors . A queue processor reads entries from a work queue and then handles each entry. Which entries and how each entry is handled is determined by the queue processor. Queues and Queue Processors appear in your Data Exchange Framework tenants at following path - /sitecore/system/Data Exchange/Your Tenant/Queues If you are upgrading to Data Exchange Framework 6 like us from an older version, you will find that these Queues related items don't exist in your tenant anymore in a new installation. If you have upgraded your databases or installed Data Exchange Framework package on top of older version, you may still see these items as they may have not got removed. You may want to test the impact on your Data exchange framework functionality and remove them. It is recommended to find what particular things the custom processors and converters used in Queues ...