The kmod-ipt-nat6 can't be installed correctlly

For Developers
1

I wan to configure my router ipv6 via the method https://blog.blacate.me/2017/04/09/ipv6-nat-on-openert-lede/.
but the kmod-ipt-nat6 can't be installed .

my router is y1 :

2

https://lede-project.org/faq/after_installation#cannot_satisfy_dependencies