dovecot - Nov 2020 - Error: Mailbox INBOX: Sync failed

Just saw in my logfile this line appeared:

imap(xxxxxx)<56614><CMMJw9i0aoBSsH9H>: Error: Mailbox INBOX: Sync
failed
for mbox: Expunged message reappeared to mailbox (UID 174550 < 174552, 
seq=11, idx_msgs=9)

Looks like messages' UIDs are mixed up?
I thought that if Dovecot sees broken X-UID headers for "new"
messages,
they're silently fixed?

Can you tell how I can correct this error/warning? Thanks!

BR, Jos

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Op 24-11-20 om 12:46 schreef Jos Chrispijn:
> Just saw in my logfile this line appeared:
> 
> imap(xxxxxx)<56614><CMMJw9i0aoBSsH9H>: Error: Mailbox INBOX:
Sync failed
> for mbox: Expunged message reappeared to mailbox (UID 174550 < 174552, 
> seq=11, idx_msgs=9)
> 
> Looks like messages' UIDs are mixed up?
> I thought that if Dovecot sees broken X-UID headers for "new"
messages,
> they're silently fixed?
> 
> Can you tell how I can correct this error/warning? Thanks!
Anyone have a suggestion? Aki?
Best,
Jos