diff --git a/api/migrations/versions/2026_03_09_1200-5ee0aa981887_add_app_asset_contents_table.py b/api/migrations/versions/2026_03_09_1200-5ee0aa981887_add_app_asset_contents_table.py
index fe4a44ff22..46e586807d 100644
--- a/api/migrations/versions/2026_03_09_1200-5ee0aa981887_add_app_asset_contents_table.py
+++ b/api/migrations/versions/2026_03_09_1200-5ee0aa981887_add_app_asset_contents_table.py
@@ -13,7 +13,7 @@ import models as models
 
 # revision identifiers, used by Alembic.
 revision = "5ee0aa981887"
-down_revision = "aab323465866"
+down_revision = "fce013ca180e"
 branch_labels = None
 depends_on = None
 
diff --git a/api/models/app_asset.py b/api/models/app_asset.py
index c2d32b2d42..d2c1efc10a 100644
--- a/api/models/app_asset.py
+++ b/api/models/app_asset.py
@@ -2,7 +2,7 @@ from datetime import datetime
 from uuid import uuid4
 
 import sqlalchemy as sa
-from sqlalchemy import DateTime, Integer, func
+from sqlalchemy import DateTime, Integer, String, func
 from sqlalchemy.orm import Mapped, mapped_column
 
 from core.app.entities.app_asset_entities import AppAssetFileTree