A variety of errors could occur depending on the client and what the CDA 2.1 looks like for their specific install. Also the published mapping to be removed could be in different steps or different parts of the channel depending on if it is for a VDT, TOC, CSV, or bulk export. Also you may not need to remove the mapping at all again depending on what the client is trying to accomplish with the 2.1 CDA. You may also want to delete the published mapping or just remove the connections, depending again on what the client is looking to accomplish.
