KMail is driving me mad!

[Peter Humphrey]

On Monday, 28 August 2017 10:12:35 BST I wrote:

--->8

> That's all I can think of at the moment.

Now I have four duplicate pairs in my gentoo-user list's folder, but this 
time when I try to delete any of them, or de-dup the folder, I get:

"Unable to fetch item from backend (collection -1) : Unable to retrieve item 
from resource: Multiple merge candidates, aborting"

How can I recover from this? Other, preferably, than deleting the folder and 
reimporting yesterday's archive, thus losing the problem messages and the 
others that have come in since I made the archive.

-- 
Regards,
Peter.