You are attempting to repair a space-efficient VDisk copy that is reporting corrupt metadata. The cluster cannot repair the VDisk copy because although it was recognized as a valid space-efficient disk when it was imported into this cluster, the real size allocated to the VDisk copy is too small. The most probable cause is that the incorrect value was supplied with -rsize parameter when the VDisk copy was imported.
Delete the VDisk copy. Resubmit the import operation either using a larger value for -rsize, or supplying the -rsize parameter without a value to let the system choose a real size.