diff --git a/backend/src/main/resources/db/migration/V2__metersphere_ddl.sql b/backend/src/main/resources/db/migration/V2__metersphere_ddl.sql
index 5e69ceaade..cd6a2e1789 100644
--- a/backend/src/main/resources/db/migration/V2__metersphere_ddl.sql
+++ b/backend/src/main/resources/db/migration/V2__metersphere_ddl.sql
@@ -74,7 +74,7 @@ CREATE TABLE IF NOT EXISTS `load_test_report_log` (
   `content` longtext ,
   `part` bigint(20) DEFAULT NULL,
   PRIMARY KEY (`id`),
-  KEY `load_test_report_log_report_id_resource_name_index` (`report_id`,`resource_id`)
+  KEY `load_test_report_log_report_id_resource_name_index` (`report_id`,`resource_id`,`part`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin ;
 
 CREATE TABLE IF NOT EXISTS `load_test_report_result` (