diff --git a/apps/emqx_bridge/src/schema/emqx_bridge_mqtt_config.erl b/apps/emqx_bridge/src/schema/emqx_bridge_mqtt_config.erl
index 2e4c17a25..997337c9d 100644
--- a/apps/emqx_bridge/src/schema/emqx_bridge_mqtt_config.erl
+++ b/apps/emqx_bridge/src/schema/emqx_bridge_mqtt_config.erl
@@ -14,6 +14,8 @@
 %% limitations under the License.
 %%--------------------------------------------------------------------
 
+%% @doc This module was created to convert old version (from v5.0.0 to v5.0.11)
+%% mqtt connector configs to newer version (developed for enterprise edition).
 -module(emqx_bridge_mqtt_config).
 
 -export([
diff --git a/apps/emqx_bridge/src/schema/emqx_bridge_schema.erl b/apps/emqx_bridge/src/schema/emqx_bridge_schema.erl
index 31fc3bcc1..756a8347d 100644
--- a/apps/emqx_bridge/src/schema/emqx_bridge_schema.erl
+++ b/apps/emqx_bridge/src/schema/emqx_bridge_schema.erl
@@ -96,13 +96,17 @@ fields(bridges) ->
         {webhook,
             mk(
                 hoconsc:map(name, ref(emqx_bridge_webhook_schema, "config")),
-                #{desc => ?DESC("bridges_webhook")}
+                #{
+                    desc => ?DESC("bridges_webhook"),
+                    required => false
+                }
             )},
         {mqtt,
             mk(
                 hoconsc:map(name, ref(emqx_bridge_mqtt_schema, "config")),
                 #{
                     desc => ?DESC("bridges_mqtt"),
+                    required => false,
                     converter => fun emqx_bridge_mqtt_config:upgrade_pre_ee/1
                 }
             )}
diff --git a/lib-ee/emqx_ee_bridge/src/emqx_ee_bridge.erl b/lib-ee/emqx_ee_bridge/src/emqx_ee_bridge.erl
index 96efee066..e0d362f5e 100644
--- a/lib-ee/emqx_ee_bridge/src/emqx_ee_bridge.erl
+++ b/lib-ee/emqx_ee_bridge/src/emqx_ee_bridge.erl
@@ -62,17 +62,26 @@ fields(bridges) ->
         {kafka,
             mk(
                 hoconsc:map(name, ref(emqx_ee_bridge_kafka, "config")),
-                #{desc => <<"EMQX Enterprise Config">>}
+                #{
+                    desc => <<"Kafka Bridge Config">>,
+                    required => false
+                }
             )},
         {hstreamdb,
             mk(
                 hoconsc:map(name, ref(emqx_ee_bridge_hstreamdb, "config")),
-                #{desc => <<"EMQX Enterprise Config">>}
+                #{
+                    desc => <<"HStreamDB Bridge Config">>,
+                    required => false
+                }
             )},
         {mysql,
             mk(
                 hoconsc:map(name, ref(emqx_ee_bridge_mysql, "config")),
-                #{desc => <<"EMQX Enterprise Config">>}
+                #{
+                    desc => <<"MySQL Bridge Config">>,
+                    required => false
+                }
             )}
     ] ++ mongodb_structs() ++ influxdb_structs().
 
@@ -81,7 +90,10 @@ mongodb_structs() ->
         {Type,
             mk(
                 hoconsc:map(name, ref(emqx_ee_bridge_mongodb, Type)),
-                #{desc => <<"EMQX Enterprise Config">>}
+                #{
+                    desc => <<"MongoDB Bridge Config">>,
+                    required => false
+                }
             )}
      || Type <- [mongodb_rs, mongodb_sharded, mongodb_single]
     ].
@@ -91,7 +103,10 @@ influxdb_structs() ->
         {Protocol,
             mk(
                 hoconsc:map(name, ref(emqx_ee_bridge_influxdb, Protocol)),
-                #{desc => <<"EMQX Enterprise Config">>}
+                #{
+                    desc => <<"InfluxDB Bridge Config">>,
+                    required => false
+                }
             )}
      || Protocol <- [
             %% influxdb_udp,