I keep getting this error in my email and not sure what

needs to be done to make it go away - I have created the appropriate directories more than once
here is the email error message
Subject: Cron <root@vici> /usr/share/astguiclient/AST_CRON_mix_recordings_MP3.pl
Content-Type: text/plain; charset=UTF-8
Auto-Submitted: auto-generated
X-Cron-Env: <SHELL=/bin/sh>
X-Cron-Env: <HOME=/root>
X-Cron-Env: <PATH=/usr/bin:/bin>
X-Cron-Env: <LOGNAME=root>
X-Cron-Env: <USER=root>
/usr/bin/soxmix: Failed reading /var/spool/asterisk/monitor/lost+found: Could not determine file type.
Input file and Output file are the same. Abort.
mv: cannot stat `/var/spool/asterisk/monitor/lost+found': No such file or direct
ory
rm: cannot remove `/var/spool/asterisk/monitor/DONE/lost+found': Is a directory
any guidance would be appreciated
here is the email error message
Subject: Cron <root@vici> /usr/share/astguiclient/AST_CRON_mix_recordings_MP3.pl
Content-Type: text/plain; charset=UTF-8
Auto-Submitted: auto-generated
X-Cron-Env: <SHELL=/bin/sh>
X-Cron-Env: <HOME=/root>
X-Cron-Env: <PATH=/usr/bin:/bin>
X-Cron-Env: <LOGNAME=root>
X-Cron-Env: <USER=root>
/usr/bin/soxmix: Failed reading /var/spool/asterisk/monitor/lost+found: Could not determine file type.
Input file and Output file are the same. Abort.
mv: cannot stat `/var/spool/asterisk/monitor/lost+found': No such file or direct
ory
rm: cannot remove `/var/spool/asterisk/monitor/DONE/lost+found': Is a directory
any guidance would be appreciated