CMMVC9718E The source and the target volumes in a FlashCopy® mapping must have the same preferred node.
Explanation
A Safeguarded backup must have the same preferred node as its Safeguarded source. The FlashCopy function creates copies of content on a source volume to a target volume in a mapping.User response
Create a Safeguarded backup in the Safeguarded backup location with the same preferred node as the Safeguarded source. Use the Safeguarded source as the target volume to run mkfcmap command to create a new FlashCopy mapping.