diff --git a/dolphinscheduler-dao/src/main/resources/sql/dolphinscheduler_h2.sql b/dolphinscheduler-dao/src/main/resources/sql/dolphinscheduler_h2.sql
index 097790d143..a1eb4a82d1 100644
--- a/dolphinscheduler-dao/src/main/resources/sql/dolphinscheduler_h2.sql
+++ b/dolphinscheduler-dao/src/main/resources/sql/dolphinscheduler_h2.sql
@@ -460,7 +460,8 @@ CREATE TABLE t_ds_process_definition_log
     operate_time     datetime     DEFAULT NULL,
     create_time      datetime NOT NULL,
     update_time      datetime     DEFAULT NULL,
-    PRIMARY KEY (id)
+    PRIMARY KEY (id),
+    UNIQUE KEY uniq_idx_code_version (code, version) USING BTREE
 );
 
 -- ----------------------------
diff --git a/dolphinscheduler-dao/src/main/resources/sql/dolphinscheduler_mysql.sql b/dolphinscheduler-dao/src/main/resources/sql/dolphinscheduler_mysql.sql
index a3a1e4a6b1..8ce188c945 100644
--- a/dolphinscheduler-dao/src/main/resources/sql/dolphinscheduler_mysql.sql
+++ b/dolphinscheduler-dao/src/main/resources/sql/dolphinscheduler_mysql.sql
@@ -461,7 +461,8 @@ CREATE TABLE `t_ds_process_definition_log` (
   `operate_time` datetime DEFAULT NULL COMMENT 'operate time',
   `create_time` datetime NOT NULL COMMENT 'create time',
   `update_time` datetime NOT NULL COMMENT 'update time',
-  PRIMARY KEY (`id`)
+  PRIMARY KEY (`id`),
+  UNIQUE KEY `uniq_idx_code_version` (`code`,`version`) USING BTREE
 ) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;
 
 -- ----------------------------
diff --git a/dolphinscheduler-dao/src/main/resources/sql/dolphinscheduler_postgresql.sql b/dolphinscheduler-dao/src/main/resources/sql/dolphinscheduler_postgresql.sql
index 18e222ea5b..a818a8082a 100644
--- a/dolphinscheduler-dao/src/main/resources/sql/dolphinscheduler_postgresql.sql
+++ b/dolphinscheduler-dao/src/main/resources/sql/dolphinscheduler_postgresql.sql
@@ -379,6 +379,8 @@ CREATE TABLE t_ds_process_definition_log (
   PRIMARY KEY (id)
 ) ;
 
+create UNIQUE index uniq_idx_code_version on t_ds_process_definition_log (code,version);
+
 --
 -- Table structure for table t_ds_task_definition
 --
diff --git a/dolphinscheduler-dao/src/main/resources/sql/upgrade/3.0.2_schema/mysql/dolphinscheduler_ddl.sql b/dolphinscheduler-dao/src/main/resources/sql/upgrade/3.0.2_schema/mysql/dolphinscheduler_ddl.sql
new file mode 100644
index 0000000000..13894fd3c2
--- /dev/null
+++ b/dolphinscheduler-dao/src/main/resources/sql/upgrade/3.0.2_schema/mysql/dolphinscheduler_ddl.sql
@@ -0,0 +1,38 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+*/
+SET sql_mode=(SELECT REPLACE(@@sql_mode,'ONLY_FULL_GROUP_BY',''));
+
+
+-- add unique key to t_ds_process_definition_log
+drop PROCEDURE if EXISTS add_t_ds_process_definition_log_uk_uniq_idx_code_version;
+delimiter d//
+CREATE PROCEDURE add_t_ds_process_definition_log_uk_uniq_idx_code_version()
+BEGIN
+    IF NOT EXISTS (SELECT 1 FROM INFORMATION_SCHEMA.STATISTICS
+        WHERE TABLE_NAME='t_ds_process_definition_log'
+        AND TABLE_SCHEMA=(SELECT DATABASE())
+        AND INDEX_NAME='uniq_idx_code_version')
+    THEN
+ALTER TABLE t_ds_process_definition_log ADD UNIQUE KEY uniq_idx_code_version(`code`,`version`);
+END IF;
+END;
+
+d//
+
+delimiter ;
+CALL add_t_ds_process_definition_log_uk_uniq_idx_code_version;
+DROP PROCEDURE add_t_ds_process_definition_log_uk_uniq_idx_code_version;
diff --git a/dolphinscheduler-dao/src/main/resources/sql/upgrade/3.0.2_schema/mysql/dolphinscheduler_dml.sql b/dolphinscheduler-dao/src/main/resources/sql/upgrade/3.0.2_schema/mysql/dolphinscheduler_dml.sql
new file mode 100644
index 0000000000..4a14f326b9
--- /dev/null
+++ b/dolphinscheduler-dao/src/main/resources/sql/upgrade/3.0.2_schema/mysql/dolphinscheduler_dml.sql
@@ -0,0 +1,16 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+*/
diff --git a/dolphinscheduler-dao/src/main/resources/sql/upgrade/3.0.2_schema/postgresql/dolphinscheduler_ddl.sql b/dolphinscheduler-dao/src/main/resources/sql/upgrade/3.0.2_schema/postgresql/dolphinscheduler_ddl.sql
new file mode 100644
index 0000000000..a691a02a6c
--- /dev/null
+++ b/dolphinscheduler-dao/src/main/resources/sql/upgrade/3.0.2_schema/postgresql/dolphinscheduler_ddl.sql
@@ -0,0 +1,19 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+*/
+
+-- add unique key to t_ds_process_definition_log
+create UNIQUE index IF NOT EXISTS uniq_idx_code_version on t_ds_process_definition_log (code,version);
diff --git a/dolphinscheduler-dao/src/main/resources/sql/upgrade/3.0.2_schema/postgresql/dolphinscheduler_dml.sql b/dolphinscheduler-dao/src/main/resources/sql/upgrade/3.0.2_schema/postgresql/dolphinscheduler_dml.sql
new file mode 100644
index 0000000000..4a14f326b9
--- /dev/null
+++ b/dolphinscheduler-dao/src/main/resources/sql/upgrade/3.0.2_schema/postgresql/dolphinscheduler_dml.sql
@@ -0,0 +1,16 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+*/
diff --git a/dolphinscheduler-dao/src/main/resources/sql/upgrade/3.2.0_schema/mysql/dolphinscheduler_ddl.sql b/dolphinscheduler-dao/src/main/resources/sql/upgrade/3.2.0_schema/mysql/dolphinscheduler_ddl.sql
index 55c7e09738..d852683640 100644
--- a/dolphinscheduler-dao/src/main/resources/sql/upgrade/3.2.0_schema/mysql/dolphinscheduler_ddl.sql
+++ b/dolphinscheduler-dao/src/main/resources/sql/upgrade/3.2.0_schema/mysql/dolphinscheduler_ddl.sql
@@ -119,4 +119,4 @@ d//
 
 delimiter ;
 CALL uc_dolphin_T_t_ds_task_instance_R_test_flag;
-DROP PROCEDURE uc_dolphin_T_t_ds_task_instance_R_test_flag;
\ No newline at end of file
+DROP PROCEDURE uc_dolphin_T_t_ds_task_instance_R_test_flag;
diff --git a/dolphinscheduler-dao/src/main/resources/sql/upgrade/3.2.0_schema/postgresql/dolphinscheduler_ddl.sql b/dolphinscheduler-dao/src/main/resources/sql/upgrade/3.2.0_schema/postgresql/dolphinscheduler_ddl.sql
index afc65fb681..8b6dbba36b 100644
--- a/dolphinscheduler-dao/src/main/resources/sql/upgrade/3.2.0_schema/postgresql/dolphinscheduler_ddl.sql
+++ b/dolphinscheduler-dao/src/main/resources/sql/upgrade/3.2.0_schema/postgresql/dolphinscheduler_ddl.sql
@@ -118,4 +118,4 @@ $$ LANGUAGE plpgsql;
 d//
 delimiter ;
 select uc_dolphin_T_t_ds_task_instance_R_test_flag();
-DROP FUNCTION uc_dolphin_T_t_ds_task_instance_R_test_flag();
\ No newline at end of file
+DROP FUNCTION uc_dolphin_T_t_ds_task_instance_R_test_flag();