diff --git a/hwe/sammo/ResetHelper.php b/hwe/sammo/ResetHelper.php
index db1475c2..5c188c0c 100644
--- a/hwe/sammo/ResetHelper.php
+++ b/hwe/sammo/ResetHelper.php
@@ -190,6 +190,7 @@ class ResetHelper{
         $db = DB::db();
         $gameStor = KVStorage::getStorage($db, 'game_env');
         $db->insert('plock', [
+            'type'=>'GAME',
             'plock'=>1,
             'locktime'=>TimeUtil::now(true)
         ]);
diff --git a/hwe/sql/schema.sql b/hwe/sql/schema.sql
index 900de7db..3e052ee0 100644
--- a/hwe/sql/schema.sql
+++ b/hwe/sql/schema.sql
@@ -238,9 +238,11 @@ CREATE TABLE `troop` (
 
 CREATE TABLE `plock` (
 	`no` INT(11) NOT NULL AUTO_INCREMENT,
+	`type` ENUM('GAME', 'ETC', 'TOURNAMENT') NOT NULL DEFAULT 'GAME',
 	`plock` INT(1) NOT NULL DEFAULT '0',
 	`locktime` DATETIME(6) NOT NULL,
-	PRIMARY KEY (`no`)
+	PRIMARY KEY (`no`),
+	UNIQUE INDEX `type` (`type`)
 )
 DEFAULT CHARSET=utf8mb4
 ENGINE=Aria