Fatal error: 1048:Column 'value' cannot be null :: insert into sessions (sesskey, ex

[mc12345678]

Not sure what you mean by "Requester information has been obscured" as an error msg. is an error msg.

To answer your question though, I can confirm it was a Google Bot.

Would like to point out some confusion though as this thread is about a "cannot be null" error in 1.5.5 and pretty close to what to I was experiencing. Was also not aware of the code change made in 1.5.5a till mentioned by mc12345678. I didn't see a Zen Version version number in your post on page 2 about using the "stringIgnoreNull" so not sure what version you were referring to for the change. Will try what you suggest though and see what results will be.

I also appreciate your help in the other, unrelated matter and glad you got it resolved so quickly.

Rob, the issue is exactly what's being experienced on the site you manage (and you're welcome!).

Which was confirmed to be on target with the "why" the problem was occurring by identifying the "visitor"/visitor type (item in the spiders.txt file causing the visitor to be identified as a spider and more than likely the default sessions values) that caused the error.

So yeah, on the same/right page/topic. Hopefully as a part of the discussion you've also now started looking at applying the fixes identified up to and including ZC 1.5.5d.