This article describes how to enable Asset Types when your Asset Bank already contains some assets. Only applies to versions of Asset Bank with the asset-entities-enabled setting and clients that have a license that permits them to use the Asset Types functionality.
Edit asset-bank/WEB-INF/classes/ApplicationSettings.properties and set asset-entities-enabled=true.
Restart Asset Bank (this is usually done by restarting the Apache Tomcat service).
Log in to Asset Bank as an admin user.
Go to Admin -> Asset Types and create an Asset Type.
Find out the ID of the Asset Type you just created by running the following SQL query against the database:
SELECT Id FROM AssetEntity;
Update all of the existing assets to be of that Asset Type by running the following SQL, replacing <asset type id> with the ID obtained from the previous query:
UPDATE Asset SET AssetEntityId = <asset type id>;
In the application, perform a reindex by going to Admin -> Attributes -> reindex existing items.