CMMVC7159E The change volume could not be associated because the relationship has a volume on this cluster that is in an I/O group with no online nodes or because there are unrecovered FlashCopy mappings in the I/O group.
Explanation
FlashCopy metadata was lost and cannot be recovered.
User response
The nodes of the I/O group must be brought online before the change volume can be associated. If the nodes of the I/O group were removed, then delete any FlashCopy mappings that existed prior to removing the nodes. .