I am getting an intermittent error from the session_data_manager object that gives me the following information: Error Type: KeyError Error Value: duplicate key 24438444A0h9Emyt1QA The traceback is below. I have a Python Script named standard_security_header that is checking session data upon entry into certain pages. The line in that script that is referenced in the traceback is: session = request.SESSION Any idea as to why this duplicate key error is happening? Thanks, Kevin ---------- Begin Traceback ------------------ Traceback (innermost last): File /zope/lib/python/ZPublisher/Publish.py, line 150, in publish_module File /zope/lib/python/ZPublisher/Publish.py, line 114, in publish File /zope/lib/python/Zope/__init__.py, line 159, in zpublisher_exception_hook (Object: index_html) File /zope/lib/python/ZPublisher/Publish.py, line 98, in publish File /usr/local/Zope-2.5.0-linux2-x86/lib/python/ZPublisher/mapply.py, line 88, in mapply (Object: userServiceStatus) File /zope/lib/python/ZPublisher/Publish.py, line 39, in call_object (Object: userServiceStatus) File /usr/local/Zope-2.5.0-linux2-x86/lib/python/OFS/DTMLMethod.py, line 127, in __call__ (Object: userServiceStatus) File /usr/local/Zope-2.5.0-linux2-x86/lib/python/DocumentTemplate/DT_String.py, line 473, in __call__ (Object: userServiceStatus) File /usr/local/Zope-2.5.0-linux2-x86/lib/python/Shared/DC/Scripts/Bindings.py, line 266, in __render_with_namespace__ (Object: standard_security_header) File /usr/local/Zope-2.5.0-linux2-x86/lib/python/Shared/DC/Scripts/Bindings.py, line 283, in _bindAndExec (Object: standard_security_header) File /zope/lib/python/Products/PythonScripts/PythonScript.py, line 302, in _exec (Object: standard_security_header) (Info: ({'script': <PythonScript instance at 91ad318>, 'context': <DTMLMethod instance at 9099fb8>, 'container': <SkinnedFolder instance at 8e76f88>, 'traverse_subpath': []}, (), {}, None)) File Script (Python), line 3, in standard_security_header File /usr/local/Zope-2.5.0-linux2-x86/lib/python/AccessControl/ZopeGuards.py, line 47, in guarded_getattr File /zope/lib/python/ZPublisher/HTTPRequest.py, line 851, in __getattr__ File /zope/lib/python/ZPublisher/HTTPRequest.py, line 837, in get File /zope/lib/python/Products/Sessions/SessionDataManager.py, line 92, in getSessionData (Object: session_data_manager) File /zope/lib/python/Products/Sessions/SessionDataManager.py, line 175, in _getSessionDataObject (Object: session_data_manager) File /usr/local/Zope-2.5.0-linux2-x86/lib/python/Products/Transience/Transience.p y, line 133, in new_or_existing (Object: session_data) File /usr/local/Zope-2.5.0-linux2-x86/lib/python/Products/Transience/Transience.p y, line 159, in new (Object: session_data) KeyError: (see above)