diff --git a/conf/db/upgrade/V5.5.28__schema.sql b/conf/db/upgrade/V5.5.28__schema.sql
index 4f96610e446..18574920d6f 100644
--- a/conf/db/upgrade/V5.5.28__schema.sql
+++ b/conf/db/upgrade/V5.5.28__schema.sql
@@ -4,7 +4,7 @@ ALTER TABLE `zstack`.`AlarmVO` ADD COLUMN `recoveryThreshold` int unsigned DEFAU
 CREATE TABLE IF NOT EXISTS `zstack`.`AlarmResourceStateVO` (
     `id` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
     `alarmUuid` varchar(32) NOT NULL,
-    `identifyLabel` varchar(200) NOT NULL,
+    `identifyLabel` varchar(191) NOT NULL,
     `resourceUuid` varchar(32) DEFAULT NULL,
     `resourceType` varchar(256) DEFAULT NULL,
     `status` varchar(32) NOT NULL,
@@ -12,7 +12,7 @@ CREATE TABLE IF NOT EXISTS `zstack`.`AlarmResourceStateVO` (
     `lastOpDate` timestamp ON UPDATE CURRENT_TIMESTAMP,
     `createDate` timestamp,
     PRIMARY KEY (`id`),
-    UNIQUE KEY `ukAlarmUuidIdentifyLabel` (`alarmUuid`, `identifyLabel`),
+    UNIQUE KEY `ukAlarmUuidIdentifyLabel` (`alarmUuid`, `identifyLabel`, `resourceUuid`),
     KEY `idxAlarmResourceStateVOresourceUuid` (`resourceUuid`),
     CONSTRAINT `fkAlarmResourceStateVOAlarmVO` FOREIGN KEY (`alarmUuid`) REFERENCES `AlarmVO` (`uuid`) ON DELETE CASCADE
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8;