Just wanted to let you know I ended up in a situation where multiple articles are now in “Unknown Section”. See below:

Clicking any of the buttons shown there results in this error:

I did a strange sequence of actions so I'm not entirely sure which specific part did it but here's what I can recall:

* Group of articles were publicly visible in a section.

* I deleted the parent section. This archived the articles.

* In the admin, I group selected all the articles and clicked “Restore”.

* I was asked where I wanted to put them and I chose a new location.

* I couldn't see the articles when using the Guide (so this could be where the problem started) so I tried changing the review status of them, but this didn't make any difference.

Any help appreciated!