diff --git a/persistence/0033_2.4.5_mqtt_upload_topic.sql b/persistence/0033_2.4.5_mqtt_upload_topic.sql
new file mode 100644
index 000000000..c359af13d
--- /dev/null
+++ b/persistence/0033_2.4.5_mqtt_upload_topic.sql
@@ -0,0 +1,59 @@
+/**
+ * NEURON IIoT System for Industry 4.0
+ * Copyright (C) 2020-2023 EMQ Technologies Co., Ltd All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ **/
+BEGIN TRANSACTION;
+
+-- for backward compatibility with version 2.3,
+-- migrate MQTT plugin upload-topic to subscription parameters.
+WITH
+  topics AS (
+    SELECT
+      name AS app,
+      json_extract(json(setting), '$.params.upload-topic') AS topic
+    FROM
+      nodes
+      JOIN settings
+    WHERE
+      name = node_name
+      AND plugin_name = 'MQTT'
+  )
+UPDATE
+  subscriptions
+SET
+  params = (
+    SELECT
+      json_object('params', json_object('topic', topic)) AS params
+    FROM
+      topics
+    WHERE
+      topics.app = subscriptions.app_name
+      AND topics.topic NOT NULL
+  )
+WHERE
+  EXISTS (
+    SELECT
+      topic
+    FROM
+      topics
+    WHERE
+      topics.app = subscriptions.app_name
+      AND topics.topic NOT NULL
+      AND subscriptions.params IS NULL
+  );
+
+COMMIT;
diff --git a/src/core/manager.c b/src/core/manager.c
index 20aa02a53..d445731ac 100644
--- a/src/core/manager.c
+++ b/src/core/manager.c
@@ -482,6 +482,8 @@ static int manager_loop(enum neu_event_io_type type, int fd, void *usr_data)
             forward_msg(manager, msg, cmd->app);
             manager_storage_subscribe(manager, cmd->app, cmd->driver,
                                       cmd->group, cmd->params);
+        } else {
+            free(cmd->params);
         }
 
         header->type = NEU_RESP_ERROR;