diff --git a/docker/initsql/a-n9e.sql b/docker/initsql/a-n9e.sql
index 045c77a3..0349a7ad 100644
--- a/docker/initsql/a-n9e.sql
+++ b/docker/initsql/a-n9e.sql
@@ -456,7 +456,7 @@ CREATE TABLE `alert_cur_event` (
     `annotations` text not null comment 'annotations',
     `rule_config` text not null comment 'annotations',
     `tags` varchar(1024) not null default '' comment 'merge data_tags rule_tags, split by ,,',
-    `original_tags` varchar(1024) default '' comment 'labels key=val,,k2=v2',
+    `original_tags` text comment 'labels key=val,,k2=v2',
     PRIMARY KEY (`id`),
     KEY (`hash`),
     KEY (`rule_id`),
@@ -496,7 +496,7 @@ CREATE TABLE `alert_his_event` (
     `recover_time` bigint not null default 0,
     `last_eval_time` bigint not null default 0 comment 'for time filter',
     `tags` varchar(1024) not null default '' comment 'merge data_tags rule_tags, split by ,,',
-    `original_tags` varchar(1024) default '' comment 'labels key=val,,k2=v2',
+    `original_tags` text comment 'labels key=val,,k2=v2',
     `annotations` text not null comment 'annotations',
     `rule_config` text not null comment 'annotations',
     PRIMARY KEY (`id`),
diff --git a/docker/migratesql/migrate.sql b/docker/migratesql/migrate.sql
index c20d4cac..65b71ac2 100644
--- a/docker/migratesql/migrate.sql
+++ b/docker/migratesql/migrate.sql
@@ -82,5 +82,5 @@ ALTER TABLE users ADD COLUMN last_active_time BIGINT NOT NULL DEFAULT 0;
 ALTER TABLE recording_rule ADD COLUMN cron_pattern VARCHAR(255) DEFAULT '' COMMENT 'cron pattern';
 
 /* v7.0.0-beta.14 */
-ALTER TABLE alert_cur_event ADD COLUMN original_tags VARCHAR(1024) DEFAULT '' COMMENT 'labels key=val,,k2=v2';
-ALTER TABLE alert_his_event ADD COLUMN original_tags VARCHAR(1024) DEFAULT '' COMMENT 'labels key=val,,k2=v2';
\ No newline at end of file
+ALTER TABLE alert_cur_event ADD COLUMN original_tags TEXT COMMENT 'labels key=val,,k2=v2';
+ALTER TABLE alert_his_event ADD COLUMN original_tags TEXT COMMENT 'labels key=val,,k2=v2';
\ No newline at end of file
diff --git a/models/migrate/migrate.go b/models/migrate/migrate.go
index ad1db439..d7fdc353 100644
--- a/models/migrate/migrate.go
+++ b/models/migrate/migrate.go
@@ -219,11 +219,11 @@ type TaskRecord struct {
 }
 type AlertHisEvent struct {
 	LastEvalTime int64  `gorm:"column:last_eval_time;bigint(20);not null;default:0;comment:for time filter;index:idx_last_eval_time"`
-	OriginalTags string `gorm:"column:original_tags;type:varchar(1024);default:'';comment:labels key=val,,k2=v2"`
+	OriginalTags string `gorm:"column:original_tags;type:text;comment:labels key=val,,k2=v2"`
 }
 
 type AlertCurEvent struct {
-	OriginalTags string `gorm:"column:original_tags;type:varchar(1024);default:'';comment:labels key=val,,k2=v2"`
+	OriginalTags string `gorm:"column:original_tags;type:text;comment:labels key=val,,k2=v2"`
 }
 
 type Target struct {