Error in mailscanner with ID's duplicated

[Dario Hernan]

Hi all! I have a problem with mailscanner, in the maillog file appears
errors of unlinking

this is the error:

grep Unlinking /var/log/maillog
Sep 23 08:32:27 xxxxxx MailScanner[16352]: Unlinking
/var/spool/mqueue.in/qfl8NDW7N0015922 failed: No such file or
directory
Sep 23 08:32:27 xxxxxx MailScanner[16352]: Unlinking
/var/spool/mqueue.in/dfl8NDW7N0015922 failed: No such file or
directory

I was looking in google, but all posts talk about the lock type.
in my conhnfiguration the lock type is posix.

sendmail version is 8.13.8
SpamAssassin version 3.2.1
the version of the mailscanner is the lastest

can anybody help me??

Thanks in advance
Dario