Canto error

[ValWood]

I got this error last night. I have also seem it a few days ago. It goes away when you reload so not urgent

this was
277396acb0ad5aef

[kimrutherford]

Unfortunately I can't reproduce the error.

I've had a good look at the code where the error occurred and I can't see how it could happen. I've modified that code to be even more careful about database access in the hope that the problem will be fixed or we'll get more detail in the error message about the cause of the problem.

Let's leave this open for a week or two in case it happens again.