Traceback (most recent call last):
  File "/Development/Plone/coredev52multipy/py3/eggs/zope.interface-4.6.0-py3.7-linux-x86_64.egg/zope/interface/declarations.py", line 269, in implementedByFallback
    bases = cls.__bases__
AttributeError: 'ZODBReference' object has no attribute '__bases__'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Development/Plone/coredev52multipy/py3/eggs/zodbupdate-1.2-py3.7.egg/zodbupdate/main.py", line 214, in main
    updater()
  File "/Development/Plone/coredev52multipy/py3/eggs/zodbupdate-1.2-py3.7.egg/zodbupdate/update.py", line 82, in __call__
    new = self.processor.rename(current)
  File "/Development/Plone/coredev52multipy/py3/eggs/zodbupdate-1.2-py3.7.egg/zodbupdate/serialize.py", line 333, in rename
    data = unpickler.load()
  File "/Development/Plone/coredev52multipy/py3/eggs/zope.interface-4.6.0-py3.7-linux-x86_64.egg/zope/interface/declarations.py", line 272, in implementedByFallback
    raise TypeError("ImplementedBy called for non-factory", cls)
TypeError: ('ImplementedBy called for non-factory', <zodbupdate.serialize.ZODBReference object at 0x7fe45a0fb5c0>)
Stopped processing, due to: ('ImplementedBy called for non-factory', <zodbupdate.serialize.ZODBReference object at 0x7fe45a0fb5c0>)
Traceback (most recent call last):
  File "/Development/Plone/coredev52multipy/py3/eggs/zope.interface-4.6.0-py3.7-linux-x86_64.egg/zope/interface/declarations.py", line 269, in implementedByFallback
    bases = cls.__bases__
AttributeError: 'ZODBReference' object has no attribute '__bases__'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Development/Plone/coredev52multipy/py3/eggs/zodbupdate-1.2-py3.7.egg/zodbupdate/main.py", line 214, in main
    updater()
  File "/Development/Plone/coredev52multipy/py3/eggs/zodbupdate-1.2-py3.7.egg/zodbupdate/update.py", line 82, in __call__
    new = self.processor.rename(current)
  File "/Development/Plone/coredev52multipy/py3/eggs/zodbupdate-1.2-py3.7.egg/zodbupdate/serialize.py", line 333, in rename
    data = unpickler.load()
  File "/Development/Plone/coredev52multipy/py3/eggs/zope.interface-4.6.0-py3.7-linux-x86_64.egg/zope/interface/declarations.py", line 272, in implementedByFallback
    raise TypeError("ImplementedBy called for non-factory", cls)
TypeError: ('ImplementedBy called for non-factory', <zodbupdate.serialize.ZODBReference object at 0x7fe45a0fb5c0>)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "./py3/bin/zodbupdate", line 265, in <module>
    sys.exit(zodbupdate.main.main())
  File "/Development/Plone/coredev52multipy/py3/eggs/zodbupdate-1.2-py3.7.egg/zodbupdate/main.py", line 218, in main
    raise AssertionError()
AssertionError