HyperSwap volumes contain a copy on each site, and copying data from one site to the other introduces significant unnecessary data movement. For a FlashCopy consistency group that has one or more maps that copy data from a HyperSwap volume, the HyperSwap volume must have an up-to-date copy on the same site as the target volume of the FlashCopy mapping.
Allow the HyperSwap volume to synchronize fully before you start the FlashCopy mapping. Alternatively, create and use a FlashCopy mapping on the same site as the up-to-date copy of the HyperSwap volume.