[daisy] Receiving Error 500 when viewing one page

[Thomas, Mark - BLS CTR]

Somehow, an update of one particular page now causes a jetty HTTP error
500 when viewing the page (this is in Daisy 1.4). All other pages work
fine. What I would like to do is revert the page to its previous
version, but due to the error I cannot get to the versions link for that
document. What's the easiest way to restore the previous version (or
change the latest to "draft" so the previous becomes live)? Is there a
special URL I can construct to do this? Can I script it via the API? Or
do I have to resort to restoring a backup?

Thanks,
-- Mark.

Mark Thomas
BAE SYSTEMS Information Technology