diff --git a/apps/emqx_rule_engine/src/emqx_rule_engine.appup.src b/apps/emqx_rule_engine/src/emqx_rule_engine.appup.src
index 3070d41f8..1d4e1be7b 100644
--- a/apps/emqx_rule_engine/src/emqx_rule_engine.appup.src
+++ b/apps/emqx_rule_engine/src/emqx_rule_engine.appup.src
@@ -2,7 +2,8 @@
 %% Unless you know what you are doing, DO NOT edit manually!!
 {VSN,
   [{"4.3.8",
-    [{load_module,emqx_rule_engine_cli,brutal_purge,soft_purge,[]},
+    [{load_module,emqx_rule_maps,brutal_purge,soft_purge,[]},
+     {load_module,emqx_rule_engine_cli,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_sqltester,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_runtime,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_metrics,brutal_purge,soft_purge,[]},
@@ -12,7 +13,8 @@
      {load_module,emqx_rule_registry,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_funcs,brutal_purge,soft_purge,[]}]},
    {"4.3.7",
-    [{load_module,emqx_rule_engine_cli,brutal_purge,soft_purge,[]},
+    [{load_module,emqx_rule_maps,brutal_purge,soft_purge,[]},
+     {load_module,emqx_rule_engine_cli,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_sqltester,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_runtime,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_metrics,brutal_purge,soft_purge,[]},
@@ -23,7 +25,8 @@
      {load_module,emqx_rule_utils,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_registry,brutal_purge,soft_purge,[]}]},
    {"4.3.6",
-    [{load_module,emqx_rule_engine_cli,brutal_purge,soft_purge,[]},
+    [{load_module,emqx_rule_maps,brutal_purge,soft_purge,[]},
+     {load_module,emqx_rule_engine_cli,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_sqltester,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_funcs,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_utils,brutal_purge,soft_purge,[]},
@@ -34,7 +37,8 @@
      {load_module,emqx_rule_runtime,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_engine_api,brutal_purge,soft_purge,[]}]},
    {"4.3.5",
-    [{load_module,emqx_rule_engine_cli,brutal_purge,soft_purge,[]},
+    [{load_module,emqx_rule_maps,brutal_purge,soft_purge,[]},
+     {load_module,emqx_rule_engine_cli,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_sqltester,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_funcs,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_utils,brutal_purge,soft_purge,[]},
@@ -45,7 +49,8 @@
      {load_module,emqx_rule_engine,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_engine_api,brutal_purge,soft_purge,[]}]},
    {"4.3.4",
-    [{load_module,emqx_rule_engine_cli,brutal_purge,soft_purge,[]},
+    [{load_module,emqx_rule_maps,brutal_purge,soft_purge,[]},
+     {load_module,emqx_rule_engine_cli,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_sqltester,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_funcs,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_utils,brutal_purge,soft_purge,[]},
@@ -56,7 +61,8 @@
      {load_module,emqx_rule_engine,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_engine_api,brutal_purge,soft_purge,[]}]},
    {"4.3.3",
-    [{load_module,emqx_rule_engine_cli,brutal_purge,soft_purge,[]},
+    [{load_module,emqx_rule_maps,brutal_purge,soft_purge,[]},
+     {load_module,emqx_rule_engine_cli,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_sqltester,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_funcs,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_utils,brutal_purge,soft_purge,[]},
@@ -68,7 +74,8 @@
      {load_module,emqx_rule_runtime,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_engine_api,brutal_purge,soft_purge,[]}]},
    {"4.3.2",
-    [{load_module,emqx_rule_engine_cli,brutal_purge,soft_purge,[]},
+    [{load_module,emqx_rule_maps,brutal_purge,soft_purge,[]},
+     {load_module,emqx_rule_engine_cli,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_sqltester,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_funcs,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_utils,brutal_purge,soft_purge,[]},
@@ -81,7 +88,8 @@
      {load_module,emqx_rule_runtime,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_engine_api,brutal_purge,soft_purge,[]}]},
    {"4.3.1",
-    [{load_module,emqx_rule_engine_cli,brutal_purge,soft_purge,[]},
+    [{load_module,emqx_rule_maps,brutal_purge,soft_purge,[]},
+     {load_module,emqx_rule_engine_cli,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_sqltester,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_funcs,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_utils,brutal_purge,soft_purge,[]},
@@ -94,7 +102,8 @@
      {load_module,emqx_rule_runtime,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_engine_api,brutal_purge,soft_purge,[]}]},
    {"4.3.0",
-    [{load_module,emqx_rule_engine_cli,brutal_purge,soft_purge,[]},
+    [{load_module,emqx_rule_maps,brutal_purge,soft_purge,[]},
+     {load_module,emqx_rule_engine_cli,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_sqltester,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_utils,brutal_purge,soft_purge,[]},
      {update,emqx_rule_metrics,{advanced,["4.3.0"]}},
@@ -108,7 +117,8 @@
      {load_module,emqx_rule_engine_api,brutal_purge,soft_purge,[]}]},
    {<<".*">>,[]}],
   [{"4.3.8",
-    [{load_module,emqx_rule_engine_cli,brutal_purge,soft_purge,[]},
+    [{load_module,emqx_rule_maps,brutal_purge,soft_purge,[]},
+     {load_module,emqx_rule_engine_cli,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_sqltester,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_runtime,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_metrics,brutal_purge,soft_purge,[]},
@@ -118,7 +128,8 @@
      {load_module,emqx_rule_registry,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_funcs,brutal_purge,soft_purge,[]}]},
    {"4.3.7",
-    [{load_module,emqx_rule_engine_cli,brutal_purge,soft_purge,[]},
+    [{load_module,emqx_rule_maps,brutal_purge,soft_purge,[]},
+     {load_module,emqx_rule_engine_cli,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_sqltester,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_runtime,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_metrics,brutal_purge,soft_purge,[]},
@@ -129,7 +140,8 @@
      {load_module,emqx_rule_utils,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_registry,brutal_purge,soft_purge,[]}]},
    {"4.3.6",
-    [{load_module,emqx_rule_engine_cli,brutal_purge,soft_purge,[]},
+    [{load_module,emqx_rule_maps,brutal_purge,soft_purge,[]},
+     {load_module,emqx_rule_engine_cli,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_sqltester,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_funcs,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_utils,brutal_purge,soft_purge,[]},
@@ -140,7 +152,8 @@
      {load_module,emqx_rule_runtime,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_engine_api,brutal_purge,soft_purge,[]}]},
    {"4.3.5",
-    [{load_module,emqx_rule_engine_cli,brutal_purge,soft_purge,[]},
+    [{load_module,emqx_rule_maps,brutal_purge,soft_purge,[]},
+     {load_module,emqx_rule_engine_cli,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_sqltester,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_funcs,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_utils,brutal_purge,soft_purge,[]},
@@ -151,7 +164,8 @@
      {load_module,emqx_rule_engine,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_engine_api,brutal_purge,soft_purge,[]}]},
    {"4.3.4",
-    [{load_module,emqx_rule_engine_cli,brutal_purge,soft_purge,[]},
+    [{load_module,emqx_rule_maps,brutal_purge,soft_purge,[]},
+     {load_module,emqx_rule_engine_cli,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_sqltester,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_funcs,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_utils,brutal_purge,soft_purge,[]},
@@ -162,7 +176,8 @@
      {load_module,emqx_rule_engine,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_engine_api,brutal_purge,soft_purge,[]}]},
    {"4.3.3",
-    [{load_module,emqx_rule_engine_cli,brutal_purge,soft_purge,[]},
+    [{load_module,emqx_rule_maps,brutal_purge,soft_purge,[]},
+     {load_module,emqx_rule_engine_cli,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_sqltester,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_funcs,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_utils,brutal_purge,soft_purge,[]},
@@ -174,7 +189,8 @@
      {load_module,emqx_rule_runtime,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_engine_api,brutal_purge,soft_purge,[]}]},
    {"4.3.2",
-    [{load_module,emqx_rule_engine_cli,brutal_purge,soft_purge,[]},
+    [{load_module,emqx_rule_maps,brutal_purge,soft_purge,[]},
+     {load_module,emqx_rule_engine_cli,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_sqltester,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_funcs,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_utils,brutal_purge,soft_purge,[]},
@@ -187,7 +203,8 @@
      {load_module,emqx_rule_runtime,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_engine_api,brutal_purge,soft_purge,[]}]},
    {"4.3.1",
-    [{load_module,emqx_rule_engine_cli,brutal_purge,soft_purge,[]},
+    [{load_module,emqx_rule_maps,brutal_purge,soft_purge,[]},
+     {load_module,emqx_rule_engine_cli,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_sqltester,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_funcs,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_utils,brutal_purge,soft_purge,[]},
@@ -200,7 +217,8 @@
      {load_module,emqx_rule_runtime,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_engine_api,brutal_purge,soft_purge,[]}]},
    {"4.3.0",
-    [{load_module,emqx_rule_engine_cli,brutal_purge,soft_purge,[]},
+    [{load_module,emqx_rule_maps,brutal_purge,soft_purge,[]},
+     {load_module,emqx_rule_engine_cli,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_sqltester,brutal_purge,soft_purge,[]},
      {load_module,emqx_rule_utils,brutal_purge,soft_purge,[]},
      {update,emqx_rule_metrics,{advanced,["4.3.0"]}},
diff --git a/apps/emqx_rule_engine/src/emqx_rule_maps.erl b/apps/emqx_rule_engine/src/emqx_rule_maps.erl
index 512ae5c74..20f0a6080 100644
--- a/apps/emqx_rule_engine/src/emqx_rule_maps.erl
+++ b/apps/emqx_rule_engine/src/emqx_rule_maps.erl
@@ -44,8 +44,6 @@ do_nested_get([], Val, _OrgData, _Default) ->
 nested_put(Key, Val, Data) when not is_map(Data),
                                 not is_list(Data) ->
     nested_put(Key, Val, #{});
-nested_put(_, undefined, Map) ->
-    Map;
 nested_put({var, Key}, Val, Map) ->
     general_map_put({key, Key}, Val, Map, Map);
 nested_put({path, Path}, Val, Map) when is_list(Path) ->
@@ -65,8 +63,6 @@ general_map_get(Key, Map, OrgData, Default) ->
             (not_found) -> Default
         end).
 
-general_map_put(_Key, undefined, Map, _OrgData) ->
-    Map;
 general_map_put(Key, Val, Map, OrgData) ->
     general_find(Key, Map, OrgData,
         fun
@@ -206,4 +202,4 @@ unsafe_atom_key_map(BinKeyMap) when is_map(BinKeyMap) ->
         end, #{}, BinKeyMap);
 unsafe_atom_key_map(ListV) when is_list(ListV) ->
     [unsafe_atom_key_map(V) || V <- ListV];
-unsafe_atom_key_map(Val) -> Val.
\ No newline at end of file
+unsafe_atom_key_map(Val) -> Val.
diff --git a/apps/emqx_rule_engine/test/emqx_rule_maps_SUITE.erl b/apps/emqx_rule_engine/test/emqx_rule_maps_SUITE.erl
index ffb1440d8..b20bb0164 100644
--- a/apps/emqx_rule_engine/test/emqx_rule_maps_SUITE.erl
+++ b/apps/emqx_rule_engine/test/emqx_rule_maps_SUITE.erl
@@ -41,6 +41,7 @@
 
 t_nested_put_map(_) ->
     ?assertEqual(#{a => 1}, nested_put(?path([a]), 1, #{})),
+    ?assertEqual(#{a => undefined}, nested_put(?path([a]), undefined, #{})),
     ?assertEqual(#{a => a}, nested_put(?path([a]), a, #{})),
     ?assertEqual(#{a => 1}, nested_put(?path([a]), 1, not_map)),
     ?assertEqual(#{a => #{b => b}}, nested_put(?path([a,b]), b, #{})),
@@ -172,4 +173,3 @@ all() ->
 
 suite() ->
     [{ct_hooks, [cth_surefire]}, {timetrap, {seconds, 30}}].
-