Greenhopper 5.8 doesn't work well with Oracle database due to ORA-01400

2011-10-20 10:19:10,374 http-8080-78 INFO jamesg 619x398x1 1dw7b1w 172.16.20.141,127.0.0.1 /rest/plugins/1.0/com.pyxis.greenhopper.jira-key [com.atlassian.greenhopper.upgrade] Starting upgrade task (buildNumber=12) : Migrate labs ranking data to multi-rank-field implementation
2011-10-20 10:19:38,678 http-8080-78 INFO jamesg 619x398x1 1dw7b1w 172.16.20.141,127.0.0.1 /rest/plugins/1.0/com.pyxis.greenhopper.jira-key [atlassian.greenhopper.upgrade.GhUpgradeTask012Dao] migrating labs rank data to new ranking table
2011-10-20 10:19:38,923 http-8080-78 ERROR jamesg 619x398x1 1dw7b1w 172.16.20.141,127.0.0.1 /rest/plugins/1.0/com.pyxis.greenhopper.jira-key [sal.core.upgrade.PluginUpgrader] Upgrade failed: There was a SQL exception thrown by the Active Objects library:
Database:
	- name:Oracle
	- version:Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bit Production
With the Partitioning, OLAP and Data Mining options
	- minor version:2
	- major version:10
Driver:
	- name:Oracle JDBC driver
	- version:11.2.0.1.0

java.sql.SQLException: ORA-01400: cannot insert NULL into ("JIRA_4_4"."AO_60DB71_ISSUERANKING"."ID")

com.atlassian.activeobjects.internal.ActiveObjectsSqlException: There was a SQL exception thrown by the Active Objects library:
Database:
	- name:Oracle
	- version:Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bit Production
With the Partitioning, OLAP and Data Mining options
	- minor version:2
	- major version:10
Driver:
	- name:Oracle JDBC driver
	- version:11.2.0.1.0

java.sql.SQLException: ORA-01400: cannot insert NULL into ("JIRA_4_4"."AO_60DB71_ISSUERANKING"."ID")

	at com.atlassian.activeobjects.internal.EntityManagedActiveObjects.create(EntityManagedActiveObjects.java:79)
	at com.atlassian.activeobjects.osgi.DelegatingActiveObjects.create(DelegatingActiveObjects.java:58)