Paniclog on has non-zero size

exim paniclog /var/log/exim4/paniclog on has non-zero size, mail system might be broken. The last 10 lines are quoted below.

2021-05-05 00:00:03 1le9di-0008Qv-Tx Completed
2021-05-05 00:00:03 1le9di-0008Qv-Tx Cannot open main log file "/var/log/exim4/mainlog": Permission denied: euid=110 egid=117
2021-10-20 09:05:02 1mdCDG-00072c-VC 1mdCDG-00072c-VC bad addresses found in headers
[email protected]:/var/log/exim4# ll
total 1.6M
-rw-r----- 1 Debian-exim adm 490K Jun 13 19:01 mainlog
-rw-r----- 1 Debian-exim adm 561K Jun 13 00:00 mainlog.1
-rw-r----- 1 Debian-exim adm  258 Mar 23 03:29 paniclog
-rw-r----- 1 Debian-exim adm 216K Jun 13 19:00 rejectlog
-rw-r----- 1 Debian-exim adm 272K Jun 12 23:57 rejectlog.1
[email protected]:/var/log/exim4#

Truncate the log file and restart exim, then habe an eye on it if all works well.