diff --git a/luci-app-passwall2/root/usr/share/passwall2/subscribe.lua b/luci-app-passwall2/root/usr/share/passwall2/subscribe.lua
index 48c3b93..3b081e4 100755
--- a/luci-app-passwall2/root/usr/share/passwall2/subscribe.lua
+++ b/luci-app-passwall2/root/usr/share/passwall2/subscribe.lua
@@ -182,6 +182,11 @@ do
 	if true then
 		local i = 0
 		local option = "lbss"
+		local function is_ip_port(str)
+			if type(str) ~= "string" then return false end
+			local ip, port = str:match("^([%d%.]+):(%d+)$")
+			return ip and datatypes.ipaddr(ip) and tonumber(port) and tonumber(port) <= 65535
+		end
 		uci:foreach(appname, "haproxy_config", function(t)
 			i = i + 1
 			local node_id = t[option]
@@ -191,11 +196,17 @@ do
 				remarks = "HAProxy负载均衡节点列表[" .. i .. "]",
 				currentNode = node_id and uci:get_all(appname, node_id) or nil,
 				set = function(o, server)
-					uci:set(appname, t[".name"], option, server)
-					o.newNodeId = server
+					-- 如果当前 lbss 值不是 ip:port 格式，才进行修改
+					if not is_ip_port(t[option]) then
+						uci:set(appname, t[".name"], option, server)
+						o.newNodeId = server
+					end
 				end,
 				delete = function(o)
-					uci:delete(appname, t[".name"])
+					-- 如果当前 lbss 值不是 ip:port 格式，才进行删除
+					if not is_ip_port(t[option]) then
+						uci:delete(appname, t[".name"])
+					end
 				end
 			}
 		end)