Since Ipsilon v1.0.0, the database has a schema version, and since v1.1.0, an upgrade tool is included in all releases.
Schema versions are not linked directly to an Ipsilon release: multiple releases may use the same schema, and won't need a changed schema. The list below shows which Ipsilon version a schema version was included with.
To upgrade your database, run the ipsilon-upgrade-database tool, passing it the instance name as its parameter. Example: ipsilon-upgrade-database --instance=idp
This will go through all required updates and apply them. After this script finishes, you can start your Ipsilon server again.