~ has been deprecated and will no longer be supported in future versions of rsyslog. It was replaced by stop

--- a/system/rsyslog.d/10-kamailio.conf
+++ b/system/rsyslog.d/10-kamailio.conf
@ -1,2 +1,2 @@
 if $programname == 'kamailio' then /var/log/kamailio/kamailio.log
 & ~
 & stop