[ZODB-Dev] Another weird error...

[Chris Withers]

Never seen this one before:

------
2001-08-21T07:39:43 ERROR(200) ZODB Couldn't load state for
'\x00\x00\x00\x00\x00\x00}\xb4'
Traceback (innermost last):
  File /usr/local/zope/2.4.0_base/lib/python/ZODB/Connection.py, line 544, in
setstate
  File /usr/local/zope/2.4.0_base/lib/python/ZODB/Connection.py, line 222, in
_persistent_load
    (Info: ('\x00\x00\x00\x00\x00\x02j\xda', ('Products.product.class',
'meta_type?')))
ValueError: Cache values must be persistent objects or classes.

What does it mean?
What's causing it?
How do I fix it?

Any help much appreciated...

cheers,

Chris