luci.model.uci.set("network", "wan", "ifname", " ")
end
- luci.model.uci.set("network", "wan", "_ifname", luci.model.uci.get("network", "wan", "ifname") or " ")
+ local oldif = luci.model.uci.get("network", "wan", "ifname")
+ if oldif and oldif ~= " " then
+ luci.model.uci.set("network", "wan", "_ifname", oldif)
+ end
luci.model.uci.set("network", "wan", "ifname", " ")
luci.model.uci.save("network")
luci.model.uci.unload("network")