cloning was unsuccessful

When cloning storage from existing node, I am getting 'Cloning was unsuccessful' message with this trace in logs. maas version is 3.1. Cloning is made from GUI.

2021-10-22 20:49:53 maasserver.websockets.protocol: [critical] Error on request (421) machine.action: __new__() missing 1 required positional argument: 'value'
 Traceback (most recent call last):
   File "/usr/lib/python3.8/threading.py", line 870, in run
     self._target(*self._args, **self._kwargs)
   File "/snap/maas/16873/lib/python3.8/site-packages/provisioningserver/utils/twisted.py", line 835, in worker
     return target()
   File "/snap/maas/16873/usr/lib/python3/dist-packages/twisted/_threads/_threadworker.py", line 46, in work
     task()
   File "/snap/maas/16873/usr/lib/python3/dist-packages/twisted/_threads/_team.py", line 190, in doWork
     task()
 --- <exception caught here> ---
   File "/snap/maas/16873/usr/lib/python3/dist-packages/twisted/python/threadpool.py", line 250, in inContext
     result = inContext.theWork()
   File "/snap/maas/16873/usr/lib/python3/dist-packages/twisted/python/threadpool.py", line 266, in <lambda>
     inContext.theWork = lambda: context.call(ctx, func, *args, **kw)
   File "/snap/maas/16873/usr/lib/python3/dist-packages/twisted/python/context.py", line 122, in callWithContext
     return self.currentContext().callWithContext(ctx, func, *args, **kw)
   File "/snap/maas/16873/usr/lib/python3/dist-packages/twisted/python/context.py", line 85, in callWithContext
     return func(*args,**kw)
   File "/snap/maas/16873/lib/python3.8/site-packages/provisioningserver/utils/twisted.py", line 870, in callInContext
     return func(*args, **kwargs)
   File "/snap/maas/16873/lib/python3.8/site-packages/provisioningserver/utils/twisted.py", line 202, in wrapper
     result = func(*args, **kwargs)
   File "/snap/maas/16873/lib/python3.8/site-packages/maasserver/utils/orm.py", line 756, in call_within_transaction
     return func_outside_txn(*args, **kwargs)
   File "/snap/maas/16873/lib/python3.8/site-packages/maasserver/utils/orm.py", line 559, in retrier
     return func(*args, **kwargs)
   File "/usr/lib/python3.8/contextlib.py", line 75, in inner
     return func(*args, **kwds)
   File "/snap/maas/16873/lib/python3.8/site-packages/maasserver/websockets/base.py", line 416, in prep_user_execute
     return self._call_method_track_queries(
   File "/snap/maas/16873/lib/python3.8/site-packages/maasserver/websockets/base.py", line 440, in _call_method_track_queries
     result = method(params)
   File "/snap/maas/16873/lib/python3.8/site-packages/maasserver/websockets/handlers/machine.py", line 965, in action
     return action.execute(**extra_params)
   File "/snap/maas/16873/lib/python3.8/site-packages/maasserver/node_action.py", line 185, in execute
     self._execute(*args, **kwargs)
   File "/snap/maas/16873/lib/python3.8/site-packages/maasserver/node_action.py", line 1022, in _execute
     form.save()
   File "/snap/maas/16873/lib/python3.8/site-packages/maasserver/forms/clone.py", line 164, in save
     dest.set_storage_configuration_from_node(source)
   File "/snap/maas/16873/lib/python3.8/site-packages/maasserver/models/node.py", line 4045, in set_storage_configuration_from_node
     filesystem_map = self._copy_between_block_device_mappings(mapping)
   File "/snap/maas/16873/lib/python3.8/site-packages/maasserver/models/node.py", line 4197, in _copy_between_block_device_mappings
     self_ptable = copy.deepcopy(source_ptable)
   File "/usr/lib/python3.8/copy.py", line 172, in deepcopy
     y = _reconstruct(x, memo, *rv)
   File "/usr/lib/python3.8/copy.py", line 270, in _reconstruct
     state = deepcopy(state, memo)
   File "/usr/lib/python3.8/copy.py", line 146, in deepcopy
     y = copier(x, memo)
   File "/usr/lib/python3.8/copy.py", line 230, in _deepcopy_dict
     y[deepcopy(key, memo)] = deepcopy(value, memo)
   File "/usr/lib/python3.8/copy.py", line 172, in deepcopy
     y = _reconstruct(x, memo, *rv)
   File "/usr/lib/python3.8/copy.py", line 270, in _reconstruct
     state = deepcopy(state, memo)
   File "/usr/lib/python3.8/copy.py", line 146, in deepcopy
     y = copier(x, memo)
   File "/usr/lib/python3.8/copy.py", line 230, in _deepcopy_dict
     y[deepcopy(key, memo)] = deepcopy(value, memo)
   File "/usr/lib/python3.8/copy.py", line 146, in deepcopy
     y = copier(x, memo)
   File "/usr/lib/python3.8/copy.py", line 230, in _deepcopy_dict
     y[deepcopy(key, memo)] = deepcopy(value, memo)
   File "/usr/lib/python3.8/copy.py", line 172, in deepcopy
     y = _reconstruct(x, memo, *rv)
   File "/usr/lib/python3.8/copy.py", line 270, in _reconstruct
     state = deepcopy(state, memo)
   File "/usr/lib/python3.8/copy.py", line 146, in deepcopy
     y = copier(x, memo)
   File "/usr/lib/python3.8/copy.py", line 230, in _deepcopy_dict
     y[deepcopy(key, memo)] = deepcopy(value, memo)
   File "/usr/lib/python3.8/copy.py", line 172, in deepcopy
     y = _reconstruct(x, memo, *rv)
   File "/usr/lib/python3.8/copy.py", line 270, in _reconstruct
     state = deepcopy(state, memo)
   File "/usr/lib/python3.8/copy.py", line 146, in deepcopy
     y = copier(x, memo)
   File "/usr/lib/python3.8/copy.py", line 230, in _deepcopy_dict
     y[deepcopy(key, memo)] = deepcopy(value, memo)
   File "/usr/lib/python3.8/copy.py", line 146, in deepcopy
     y = copier(x, memo)
   File "/usr/lib/python3.8/copy.py", line 230, in _deepcopy_dict
     y[deepcopy(key, memo)] = deepcopy(value, memo)
   File "/usr/lib/python3.8/copy.py", line 172, in deepcopy
     y = _reconstruct(x, memo, *rv)
   File "/usr/lib/python3.8/copy.py", line 270, in _reconstruct
     state = deepcopy(state, memo)
   File "/usr/lib/python3.8/copy.py", line 146, in deepcopy
     y = copier(x, memo)
   File "/usr/lib/python3.8/copy.py", line 230, in _deepcopy_dict
     y[deepcopy(key, memo)] = deepcopy(value, memo)
   File "/usr/lib/python3.8/copy.py", line 172, in deepcopy
     y = _reconstruct(x, memo, *rv)
   File "/usr/lib/python3.8/copy.py", line 270, in _reconstruct
     state = deepcopy(state, memo)
   File "/usr/lib/python3.8/copy.py", line 146, in deepcopy
     y = copier(x, memo)
   File "/usr/lib/python3.8/copy.py", line 230, in _deepcopy_dict
     y[deepcopy(key, memo)] = deepcopy(value, memo)
   File "/usr/lib/python3.8/copy.py", line 146, in deepcopy
     y = copier(x, memo)
   File "/usr/lib/python3.8/copy.py", line 230, in _deepcopy_dict
     y[deepcopy(key, memo)] = deepcopy(value, memo)
   File "/usr/lib/python3.8/copy.py", line 172, in deepcopy
     y = _reconstruct(x, memo, *rv)
   File "/usr/lib/python3.8/copy.py", line 270, in _reconstruct
     state = deepcopy(state, memo)
   File "/usr/lib/python3.8/copy.py", line 146, in deepcopy
     y = copier(x, memo)
   File "/usr/lib/python3.8/copy.py", line 230, in _deepcopy_dict
     y[deepcopy(key, memo)] = deepcopy(value, memo)
   File "/usr/lib/python3.8/copy.py", line 172, in deepcopy
     y = _reconstruct(x, memo, *rv)
   File "/usr/lib/python3.8/copy.py", line 270, in _reconstruct
     state = deepcopy(state, memo)
   File "/usr/lib/python3.8/copy.py", line 146, in deepcopy
     y = copier(x, memo)
   File "/usr/lib/python3.8/copy.py", line 230, in _deepcopy_dict
     y[deepcopy(key, memo)] = deepcopy(value, memo)
   File "/usr/lib/python3.8/copy.py", line 146, in deepcopy
     y = copier(x, memo)
   File "/usr/lib/python3.8/copy.py", line 230, in _deepcopy_dict
     y[deepcopy(key, memo)] = deepcopy(value, memo)
   File "/usr/lib/python3.8/copy.py", line 172, in deepcopy
     y = _reconstruct(x, memo, *rv)
   File "/usr/lib/python3.8/copy.py", line 270, in _reconstruct
     state = deepcopy(state, memo)
   File "/usr/lib/python3.8/copy.py", line 146, in deepcopy
     y = copier(x, memo)
   File "/usr/lib/python3.8/copy.py", line 230, in _deepcopy_dict
     y[deepcopy(key, memo)] = deepcopy(value, memo)
   File "/usr/lib/python3.8/copy.py", line 172, in deepcopy
     y = _reconstruct(x, memo, *rv)
   File "/usr/lib/python3.8/copy.py", line 264, in _reconstruct
     y = func(*args)
   File "/usr/lib/python3.8/copyreg.py", line 91, in __newobj__
     return cls.__new__(cls, *args)
 builtins.TypeError: __new__() missing 1 required positional argument: 'value'