How can I get an error like:

user error: Duplicate entry 'filter:1:1f0a0dac0423b0b8b91639d251230ed0'
for key 1 query:
INSERT INTO cs_cache (cid, data, created, expire, headers)
VALUES ('filter:1:1f0a0dac0423b0b8b91639d251230ed0',
'

Published on Friday, June 3, 2005...

when Drupal caching is disabled for the website?

This is on Drupal 4.5.2

Ben in DC
ben at publicmailbox dot com