lazy_class: PersistentBroken is enough for the base class of ERP5BaseBroken.

otherwise __setattr__ will raise an Exception in Python 3.

product/ERP5Type/dynamic/lazy_class.py

@@ -12,7 +12,7 @@ from Products.ERP5Type.Core.CategoryProperty import CategoryProperty
 from ExtensionClass import ExtensionClass, pmc_init_of
 
 from zope.interface import classImplements
-from ZODB.broken import Broken, PersistentBroken
+from ZODB.broken import PersistentBroken
 from AccessControl import ClassSecurityInfo
 from zLOG import LOG, WARNING, BLATHER
 
@@ -22,7 +22,7 @@ from . import persistent_migration
 from ZODB.POSException import ConflictError
 import six
 
-class ERP5BaseBroken(Broken, ERP5Base, PersistentBroken):
+class ERP5BaseBroken(ERP5Base, PersistentBroken):
   # PersistentBroken can't be reused directly
   # because its « layout differs from 'GhostPortalType' »