Error building the firmware image. Server response: Unsupported package(s): kmod-nft-nat6

Starting from [5.15.60-1-1baface726c5a96994a4aedc66b694d7] kmod-nft-nat6.ipk is no longer going to. This causes an error when building the firmware.

Request Data:

{
"url": "https://sysupgrade.openwrt.org",
"revision": "r20212-beeb49740b",
"advanced_mode": "1",
"branch": "SNAPSHOT",
"efi": null,
"profile": "xiaomi,redmi-router-ax6s",
"target": "mediatek/mt7622",
"version": "SNAPSHOT",
"packages": [
"6in4",
"auc",
"base-files",
"bind-dig",
"bind-host",
"busybox",
"ca-bundle",
"cgi-io",
"curl",
"dnsmasq-full",
"dropbear",
"firewall4",
"fstools",
"fwtool",
"getrandom",
"golang-gitlab-yawning-obfs4-dev",
"grep",
"hostapd-common",
"https-dns-proxy",
"i2pd",
"ipset",
"iptables-zz-legacy",
"iw",
"iwinfo",
"jansson",
"jshn",
"jsonfilter",
"kernel",
"kmod-cfg80211",
"kmod-crypto-aead",
"kmod-crypto-ccm",
"kmod-crypto-cmac",
"kmod-crypto-crc32c",
"kmod-crypto-ctr",
"kmod-crypto-gcm",
"kmod-crypto-gf128",
"kmod-crypto-ghash",
"kmod-crypto-hash",
"kmod-crypto-hmac",
"kmod-crypto-manager",
"kmod-crypto-null",
"kmod-crypto-rng",
"kmod-crypto-seqiv",
"kmod-crypto-sha256",
"kmod-gpio-button-hotplug",
"kmod-hwmon-core",
"kmod-ipt-nat",
"kmod-ipt-nat-extra",
"kmod-leds-gpio",
"kmod-lib-crc-ccitt",
"kmod-lib-crc32c",
"kmod-mac80211",
"kmod-mt76-connac",
"kmod-mt76-core",
"kmod-mt7615-common",
"kmod-mt7615-firmware",
"kmod-mt7615e",
"kmod-mt7915e",
"kmod-nf-conntrack",
"kmod-nf-conntrack6",
"kmod-nf-flow",
"kmod-nf-log",
"kmod-nf-log6",
"kmod-nf-nat",
"kmod-nf-nat6",
"kmod-nf-reject",
"kmod-nf-reject6",
"kmod-nfnetlink",
"kmod-nft-core",
"kmod-nft-fib",
"kmod-nft-nat",
"kmod-nft-nat6",
"kmod-nft-offload",
"kmod-ppp",
"kmod-pppoe",
"kmod-pppox",
"kmod-slhc",
"libblobmsg-json",
"libc",
"libiwinfo",
"libiwinfo-data",
"libiwinfo-lua",
"libjson-c",
"libjson-script",
"liblua",
"liblucihttp",
"liblucihttp-lua",
"libmbedtls",
"libmnl",
"libnftnl",
"libnl-tiny",
"libubox",
"libubus",
"libubus-lua",
"libuci",
"libuclient",
"libucode",
"libustream-openssl",
"libwolfssl",
"logd",
"lua",
"luabitop",
"luasec",
"luasocket",
"luci",
"luci-app-adblock",
"luci-app-attendedsysupgrade",
"luci-app-ddns",
"luci-app-firewall",
"luci-app-https-dns-proxy",
"luci-app-opkg",
"luci-app-upnp",
"luci-app-wireguard",
"luci-app-wol",
"luci-base",
"luci-i18n-adblock-ru",
"luci-i18n-attendedsysupgrade-ru",
"luci-i18n-base-ru",
"luci-i18n-dashboard-ru",
"luci-i18n-ddns-ru",
"luci-i18n-firewall-ru",
"luci-i18n-https-dns-proxy-ru",
"luci-i18n-upnp-ru",
"luci-i18n-wireguard-ru",
"luci-i18n-wol-ru",
"luci-lib-base",
"luci-lib-ip",
"luci-lib-jsonc",
"luci-lib-nixio",
"luci-mod-admin-full",
"luci-mod-network",
"luci-mod-status",
"luci-mod-system",
"luci-proto-ipv6",
"luci-proto-ppp",
"luci-theme-bootstrap",
"mc",
"mtd",
"netifd",
"nftables-json",
"obfs4proxy",
"odhcp6c",
"odhcpd-ipv6only",
"openwrt-keyring",
"opkg",
"ppp",
"ppp-mod-pppoe",
"procd",
"procd-seccomp",
"procd-ujail",
"rpcd",
"rpcd-mod-file",
"rpcd-mod-iwinfo",
"rpcd-mod-luci",
"rpcd-mod-rrdns",
"tor",
"tor-geoip",
"ubi-utils",
"uboot-envtools",
"ubox",
"ubus",
"ubusd",
"uci",
"uclient-fetch",
"ucode",
"ucode-mod-fs",
"ucode-mod-ubus",
"ucode-mod-uci",
"uhttpd",
"uhttpd-mod-ubus",
"urandom-seed",
"urngd",
"usign",
"wget-ssl",
"wireless-regdb",
"wpad-mesh-openssl"
],
"diff_packages": true,
"filesystem": "squashfs",
"client": "luci/git-22.210.53339-af23d0d"
}

Start by reproducing the supplied sysupgrade.openwrt.org request for the xiaomi,redmi-router-ax6s profile and inspect the Python request-handling path for unsupported packages. Determine why kmod-nft-nat6 remains requested after the stated snapshot change, then verify that firmware generation handles the package transition without this error.