imap Error: rename failed: Too many links

Fri Apr 7 14:28:21 UTC 2023

Greetings, All!

I'm facing a problem with one particular directory in a mailbox.
The exact error line is:

Apr  7 12:00:21 mxs dovecot: imap(vera): Error: rename(/home/vera/.mail/INBOX/Майя Николаевна/new/1678353168.M710968P25673.mxs.ads.ccenter.lan,S=5442,W=5513:2,ST, /home/vera/.mail/INBOX/Майя Николаевна/cur/1678353168.M710968P25673.mxs.ads.ccenter.lan,S=5442,W=5513:2,ST) failed: Too many links

The rest of the mailbox behave correctly, as I can tell, but this specific
subdir fails to report unread mail correctly.
What are the options to fix it?

# dovecot --version
2.2.22 (fe789d2)

Config is in attachment, but I doubt it is of any interest.

-- 
With best regards,
Andrey Repin
Friday, April 7, 2023 16:37:09

Sorry for my terrible english...
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