Hosts are EL6.4

Thread-1306::ERROR::2013-09-23 16:02:42,422::BindingXMLRPC::993::vds::(wrapper) unexpected error
Traceback (most recent call last):
  File "/usr/share/vdsm/BindingXMLRPC.py", line 979, in wrapper
    res = f(*args, **kwargs)
  File "/usr/share/vdsm/BindingXMLRPC.py", line 211, in vmDestroy
    return vm.destroy()
  File "/usr/share/vdsm/API.py", line 323, in destroy
    res = v.destroy()
  File "/usr/share/vdsm/vm.py", line 4326, in destroy
    response = self.releaseVm()
  File "/usr/share/vdsm/vm.py", line 4292, in releaseVm
    self._cleanup()
  File "/usr/share/vdsm/vm.py", line 2750, in _cleanup
    self._cleanupDrives()
  File "/usr/share/vdsm/vm.py", line 2482, in _cleanupDrives
    drive, exc_info=True)
  File "/usr/lib64/python2.6/logging/__init__.py", line 1329, in error
    self.logger.error(msg, *args, **kwargs)
  File "/usr/lib64/python2.6/logging/__init__.py", line 1082, in error
    self._log(ERROR, msg, args, **kwargs)
File "/usr/lib64/python2.6/logging/__init__.py", line 1082, in error
    self._log(ERROR, msg, args, **kwargs)
  File "/usr/lib64/python2.6/logging/__init__.py", line 1173, in _log
    self.handle(record)
  File "/usr/lib64/python2.6/logging/__init__.py", line 1183, in handle
    self.callHandlers(record)
  File "/usr/lib64/python2.6/logging/__init__.py", line 1220, in callHandlers
    hdlr.handle(record)
  File "/usr/lib64/python2.6/logging/__init__.py", line 679, in handle
    self.emit(record)
  File "/usr/lib64/python2.6/logging/handlers.py", line 780, in emit
    msg = self.format(record)
  File "/usr/lib64/python2.6/logging/__init__.py", line 654, in format
    return fmt.format(record)
  File "/usr/lib64/python2.6/logging/__init__.py", line 436, in format
    record.message = record.getMessage()
  File "/usr/lib64/python2.6/logging/__init__.py", line 306, in getMessage
    msg = msg % self.args
  File "/usr/share/vdsm/vm.py", line 107, in __str__
    if not a.startswith('__')]
  File "/usr/share/vdsm/vm.py", line 1344, in hasVolumeLeases
    if self.shared != DRIVE_SHARED_TYPE.EXCLUSIVE:
AttributeError: 'Drive' object has no attribute 'shared'