Some items cannot be synchronised - how to find the offender

Operating system

Android

Joplin version

2.14.9

What issue do you have?

In the android app have the orange banner telling me that some items cannot be synchronised, but it is not clear which note is the offender. There is an item code but not a note title, making it hard to locate

I have tried searching for the item by number, and by the name of the offending file with no luck.

The item does not come up on the desktop version under Tools-Note attachments, so appears not to exist

There is no indication of this in the desktop app, and other things are synchronising successfully.

How can I find the note which is causing this issue?