crash on processing incoming document due to missing attribute party

While I am testing the incoming document (version 7.0) module with typless OCR service, I got the below error.

Traceback (most recent call last):
  File "usrlocallibpython3.11dist-packagestrytondmodelmodelstorage.py", line 1622, in __getattr__
    field = self._fields[name]
            ~~~~~~~~~~~~^^^^^^
KeyError: 'party'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "usrlocallibpython3.11dist-packagestrytondwsgi.py", line 109, in dispatch_request
    return endpoint(request, **request.view_args)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "usrlocallibpython3.11dist-packagestrytondprotocolsdispatcher.py", line 43, in rpc
    return methods.get(request.rpc_method, _dispatch)(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "usrlocallibpython3.11dist-packagestrytondwsgi.py", line 75, in wrapper
    return func(request, *args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "usrlocallibpython3.11dist-packagestrytondprotocolswrappers.py", line 200, in wrapper
    return func(request, pool, *args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "usrlocallibpython3.11dist-packagestrytondprotocolsdispatcher.py", line 196, in _dispatch
    result = rpc.result(meth(*c_args, **c_kwargs))
                        ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "usrlocallibpython3.11dist-packagestrytondmodelmodelview.py", line 742, in wrapper
    return func(cls, records, *args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "usrlocallibpython3.11dist-packagestrytondmodelworkflow.py", line 37, in wrapper
    result = func(cls, filtered, *args, **kwargs)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "usrlocallibpython3.11dist-packagestrytondmodulesdocument_incoming_ocrdocument.py", line 51, in proceed
    super().proceed(documents, with_children=with_children)
  File "usrlocallibpython3.11dist-packagestrytondmodelmodelview.py", line 742, in wrapper
    return func(cls, records, *args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "usrlocallibpython3.11dist-packagestrytondmodelworkflow.py", line 37, in wrapper
    result = func(cls, filtered, *args, **kwargs)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "usrlocallibpython3.11dist-packagestrytondmodulesdocument_incomingdocument.py", line 228, in proceed
    document.result = getattr(document, f'_process_{document.type}')()
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "usrlocallibpython3.11dist-packagestrytondmodulesdocument_incoming_ocrdocument.py", line 92, in _process_supplier_invoice
    for identifier in self.party.identifiers:
                      ^^^^^^^^^^
  File "usrlocallibpython3.11dist-packagestrytondmodelmodelstorage.py", line 1624, in __getattr__
    raise AttributeError('"%s" has no attribute "%s"' % (self, name))
AttributeError: "document.incoming,10" has no attribute "party"