`/var/log/messages` 中有很多 ` kernel: [ ] 输出链被丢弃：IN= OUT=enp0s31f6 `

Question

我ipv6在mypcdebian 10系统中已经禁用了防火墙，nftable检查
发现/var/log/messages有很多kernel: [ ] output chain dropped如下内容：

Jul 13 11:03:14 mypc kernel: [ 8206.745775] output chain dropped: IN= OUT=enp0s31f6 SRC=fe80:0000:0000:0000:cad3:ffff:fe6e:e23b DST=ff02:0000:0000:0000:0000:0000:0000:0002 LEN=48 TC=0 HOPLIMIT=255 FLOWLBL=248793 PROTO=ICMPv6 TYPE=133 CODE=0 UID=0 GID=0
Jul 13 11:03:18 mypc kernel: [ 8210.745624] output chain dropped: IN= OUT=enp0s31f6 SRC=fe80:0000:0000:0000:cad3:ffff:fe6e:e23b DST=ff02:0000:0000:0000:0000:0000:0000:0002 LEN=48 TC=0 HOPLIMIT=255 FLOWLBL=248793 PROTO=ICMPv6 TYPE=133 CODE=0 UID=0 GID=0
Jul 13 11:03:22 mypc kernel: [ 8214.745440] output chain dropped: IN= OUT=enp0s31f6 SRC=fe80:0000:0000:0000:cad3:ffff:fe6e:e23b DST=ff02:0000:0000:0000:0000:0000:0000:0002 LEN=48 TC=0 HOPLIMIT=255 FLOWLBL=248793 PROTO=ICMPv6 TYPE=133 CODE=0 UID=0 GID=0
Jul 13 11:03:26 mypc kernel: [ 8218.745303] output chain dropped: IN= OUT=enp0s31f6 SRC=fe80:0000:0000:0000:cad3:ffff:fe6e:e23b DST=ff02:0000:0000:0000:0000:0000:0000:0002 LEN=48 TC=0 HOPLIMIT=255 FLOWLBL=248793 PROTO=ICMPv6 TYPE=133 CODE=0 UID=0 GID=0
Jul 13 11:03:30 mypc kernel: [ 8222.745452] output chain dropped: IN= OUT=enp0s31f6 SRC=fe80:0000:0000:0000:cad3:ffff:fe6e:e23b DST=ff02:0000:0000:0000:0000:0000:0000:0002 LEN=48 TC=0 HOPLIMIT=255 FLOWLBL=248793 PROTO=ICMPv6 TYPE=133 CODE=0 UID=0 GID=0

我的网络不支持 ipv6，我已经在 debian 中禁用了 ipv6。
问题出在哪里？