Mwan3 and no IPv6 available monitors IPv6?

I see
1668 root 1636 S {mwan3rtmon} /bin/sh /usr/sbin/mwan3rtmon ipv4
1669 root 1636 S {mwan3rtmon} /bin/sh /usr/sbin/mwan3rtmon ipv6
1800 root 1504 S ip -6 monitor route
1801 root 1636 S {mwan3rtmon} /bin/sh /usr/sbin/mwan3rtmon ipv6
1807 root 1504 S ip -4 monitor route

However I have no IPv6 in my custom built 22.03.2 . How to get rid of the redundant processes ?
(all monitored interfaces have option family 'ipv4')