The target volume of the FlashCopy mapping, or the target volume 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 volume.
Use the lsvdiskdependentmaps command and specify the target volume to determine which FlashCopy mappings are dependent on the target volume. Either wait for these mappings to reach the idle_or_copied state, or stop these mappings. Resubmit the command that produced this error.