[Mimedefang] bayes database lock error [SEC=OFFICIAL]

[Ryan Lindsay]

OFFICIAL

Hi
We run 4 mail servers with the same version of sendmail and mimedefang on them.
Running on RHEL 8.10
sendmail-milter-8.15.2-34.el8.x86_64
mimedefang-3.4.1-1.el8.x86_64

We basically use the servers to add the boilerplate water mark to our email.
On one of the servers, I've noticed this error re-occurs fairly regularly

Feb  4 12:14:37 prod-vmail02.aipo.gov.au mimedefang-multiplexor[1978037]: 5141ER2q1989140: Worker 0 stderr: bayes: cannot open bayes databases /var/spool/MD-Quarantine/.sp
Feb  4 12:14:37 prod-vmail02.aipo.gov.au mimedefang-multiplexor[1978037]: 5141ER2q1989140: Worker 0 stderr: amassassin/bayes_* R/W: lock failed: File exists

I'm a little stumped by this as I'm not sure what it's telling me.
I've looked at the folder and it exists
[root at prod-vmail02 .spamassassin]# ls -lah
total 4.2G
drwx------. 2 defang defang   57 Feb  4 12:25 .
drwxr-x---. 3 defang defang   26 May 16  2023 ..
-rw-------. 1 defang defang   33 Feb  4 12:25 bayes.lock
-rw-------. 1 defang defang 320M Feb  4 10:39 bayes_seen
-rw-rw-rw-. 1 defang defang 5.0G Feb  4 12:25 bayes_toks
[root at prod-vmail02 .spamassassin]# pwd
/var/spool/MD-Quarantine/.spamassassin

It doesn't appear to have a problem writing to the folder
Can someone explain this error and how to fix it?

Thanks

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