[Errno 1] Operation not permitted: '/mnt/head/iocage/defaults.json'

Error: concurrent.futures.process._RemoteTraceback:
"""
Traceback (most recent call last):
  File "/usr/local/lib/python3.6/concurrent/futures/process.py", line 175, in _process_worker
    r = call_item.fn(*call_item.args, **call_item.kwargs)
  File "/usr/local/lib/python3.6/site-packages/middlewared/worker.py", line 128, in main_worker
    res = loop.run_until_complete(coro)
  File "/usr/local/lib/python3.6/asyncio/base_events.py", line 468, in run_until_complete
    return future.result()
  File "/usr/local/lib/python3.6/site-packages/middlewared/worker.py", line 88, in _run
    return await self._call(f'{service_name}.{method}', serviceobj, methodobj, params=args, job=job)
  File "/usr/local/lib/python3.6/site-packages/middlewared/worker.py", line 81, in _call
    return methodobj(*params)
  File "/usr/local/lib/python3.6/site-packages/middlewared/worker.py", line 81, in _call
    return methodobj(*params)
  File "/usr/local/lib/python3.6/site-packages/middlewared/plugins/jail.py", line 200, in create_job
    empty=empty
  File "/usr/local/lib/python3.6/site-packages/iocage_lib/iocage.py", line 611, in create
    clone=clone,
  File "/usr/local/lib/python3.6/site-packages/iocage_lib/ioc_create.py", line 87, in create_jail
    return self._create_jail(jail_uuid, location)
  File "/usr/local/lib/python3.6/site-packages/iocage_lib/ioc_create.py", line 194, in _create_jail
    config = self.create_config(jail_uuid, cloned_release)
  File "/usr/local/lib/python3.6/site-packages/iocage_lib/ioc_create.py", line 574, in create_config
    jail_props = ioc_json.json_check_default_config()
  File "/usr/local/lib/python3.6/site-packages/iocage_lib/ioc_json.py", line 1924, in json_check_default_config
    self.json_write(default_props, default_json_location)
  File "/usr/local/lib/python3.6/site-packages/iocage_lib/ioc_json.py", line 448, in json_write
    json.dump(data, out, sort_keys=True, indent=4, ensure_ascii=False)
  File "/usr/local/lib/python3.6/contextlib.py", line 88, in __exit__
    next(self.gen)
  File "/usr/local/lib/python3.6/site-packages/iocage_lib/ioc_common.py", line 521, in open_atomic
    os.chmod(filepath, 0o644)
PermissionError: [Errno 1] Operation not permitted: '/mnt/head/iocage/defaults.json'
"""

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/local/lib/python3.6/site-packages/middlewared/job.py", line 332, in run
    await self.future
  File "/usr/local/lib/python3.6/site-packages/middlewared/job.py", line 356, in __run_body
    rv = await self.middleware._call_worker(self.serviceobj, self.method_name, *self.args, job={'id': self.id})
  File "/usr/local/lib/python3.6/site-packages/middlewared/main.py", line 1105, in _call_worker
    job,
  File "/usr/local/lib/python3.6/site-packages/middlewared/main.py", line 1036, in run_in_proc
    return await self.run_in_executor(self.__procpool, method, *args, **kwargs)
  File "/usr/local/lib/python3.6/site-packages/middlewared/main.py", line 1021, in run_in_executor
    return await loop.run_in_executor(pool, functools.partial(method, *args, **kwargs))
PermissionError: [Errno 1] Operation not permitted: '/mnt/head/iocage/defaults.json'