ReaR fails to recreate LVM volume groups when volume groups are stored on multiple disks

Issue

• When recovering a system with LVM logical volumes configured in Raid or a volume group is stored on multiple disks, restoring the disk layout fails

  Start system layout restoration.
  Disk '/dev/vda': creating 'msdos' partition table
  Disk '/dev/vda': creating partition number 1 with name 'primary'
  Disk '/dev/vda': creating partition number 2 with name 'primary'
  Creating LVM PV /dev/vdb
  Creating LVM PV /dev/vdc
  Creating LVM PV /dev/vda2
  Creating LVM VG 'data'; Warning: some properties may not be preserved...
  The disk layout recreation script failed
  

• The following message is seen when executing rear -dD recover (Full Debug mode)

  +++ Print 'Creating LVM VG '\''datavg'\''; Warning: some properties may not be preserved...'
  +++ '[' -e /dev/datavg ']'
  +++ lvm vgcreate --physicalextentsize 4096k datavg /dev/vdb /dev/vdc
    A volume group called datavg already exists.