diff --git a/scheduler/app/database/init_db.py b/scheduler/app/database/init_db.py
index 91d0f9b..2a8a053 100755
--- a/scheduler/app/database/init_db.py
+++ b/scheduler/app/database/init_db.py
@@ -22,6 +22,8 @@
 DB_HOST = os.getenv("DB_HOST", "seatable-mysql")
 DB_PORT = int(os.getenv("DB_PORT", "3306"))
 DATABASE_NAME = os.getenv("DATABASE_NAME", "scheduler")
+# All upgrade statements start from 2.2.4, but here it is not actually 2.2.4—it's just a default value.
+CURRENT_VERSION = os.getenv("VERSION", "2.2.4")
 
 
 def wait_for_mysql():
@@ -57,4 +59,18 @@ def wait_for_mysql():
 )
 os.system(sql)
 
+# Write the current version number directly during the initial deployment.
+sql = (
+    'mysql -h %s -u%s -p%s %s -e "INSERT INTO version_history (version, update_at) '
+    "SELECT '%s', NOW() WHERE NOT EXISTS (SELECT 1 FROM version_history LIMIT 1);\""
+    % (
+        shlex.quote(DB_HOST),
+        shlex.quote(db_user),
+        shlex.quote(db_passwd),
+        DATABASE_NAME,
+        CURRENT_VERSION,
+    )
+)
+os.system(sql)
+
 print("Initalization of database successful")
diff --git a/scheduler/app/upgrade/6.2.0.sql b/scheduler/app/upgrade/6.2.0.sql
index 496e840..86a0c23 100644
--- a/scheduler/app/upgrade/6.2.0.sql
+++ b/scheduler/app/upgrade/6.2.0.sql
@@ -1,9 +1,9 @@
 
 ALTER TABLE script_log MODIFY started_at DATETIME(6);
 
-ALTER TABLE script_log ADD COLUMN state VARCHAR(10);
-ALTER TABLE script_log ADD KEY state_h3u8i9o1_key (state);
+ALTER TABLE script_log ADD COLUMN IF NOT EXISTS state VARCHAR(10);
+ALTER TABLE script_log ADD INDEX IF NOT EXISTS state_h3u8i9o1_key (state);
 
-ALTER TABLE script_log ADD COLUMN created_at DATETIME(6);
-ALTER TABLE script_log ADD KEY created_at_h3u7y9o4_key (created_at);
+ALTER TABLE script_log ADD COLUMN IF NOT EXISTS created_at DATETIME(6);
+ALTER TABLE script_log ADD INDEX IF NOT EXISTS created_at_h3u7y9o4_key (created_at);
 UPDATE script_log SET created_at=started_at;