Confluence Upgrade Issue 8.5.6 to 9.2.7 – Schema Upgrade Error with Oracle 19c

[mahsa ah]

Hello everyone,

I’m trying to upgrade Confluence from version 8.5.6 to 9.2.7 using the installer, but I’m running into a “cannot upgrade schema” error during the process.

My environment:

• Database: Oracle 19c

• Driver: ojdbc11

• Permissions: I’ve already checked schema permissions, and they seem fine. I’m also able to create and alter tables manually without issues.

I’ve attached the relevant logs for reference.

2025-09-29 11:04:13,231 WARN [active-objects-init-0]
[atlassian.activeobjects.osgi.ActiveObjectsDelegate]
lambda$load$0 bundle [com.atlassian.webhooks.atlassian-webhooks-plugin]
failed to create ActiveObjects
java.lang.IllegalStateException: Could not find column 'EVENT_SCOPE_TYPE'
in previously parsed query!

2025-09-29 11:04:16,496 ERROR [Catalina-utility-1]
[atlassian.confluence.plugin.PluginFrameworkContextListener]
launchUpgrades Upgrade failed, application will not start:
com.atlassian.config.ConfigurationException: Cannot update schema

org.hibernate.tool.schema.extract.spi.SchemaExtractionException:
More than one table found in namespace (, ) : DENORMALISED_CONTENT_CHANGE_LOG

Has anyone faced a similar issue or can suggest possible solutions? Any guidance would be greatly appreciated.

Thanks in advance!