The target VDisk of the FlashCopy mapping, or the target VDisk of at least one of the FlashCopy mappings in the consistency group, has other FlashCopy mappings that are dependent on the data on the target VDisk.
Use the lsvdiskdependentmaps command and specify the target VDisk to determine which FlashCopy mappings are dependent on the target VDisk. Either wait for these mappings to reach the idle_or_copied state, or stop these mappings. Resubmit the command that produced this error.