Weird firewall rule

Software
1

Turris Omnia 4.0.3

In traffic rules list I found “Unnamed rule”. Seems like it is coming from following lines in /etc/config/firewall:

config rule 'turris_wan_6in4_rule'
        option enabled '0'

What is this rule about? Where did it come from? Should it be deleted or at least named properly?

Screenshot

See the very last one.

image
image1870×872 144 KB

2

As it is disabled, you can ignore it in good conscience.