Oracle 10g specific: schema update failure during upgrade from 2.1.7 to 2.2.7 with generated upgrade data

Schema upgrade fails during upgrade from 2.1.7 (dev 449) to 2.2.7 (.1 6) on with Oracle 10g both on Windows Server 2003 32-bit and Windows Server 2008 64-bit with generated upgrade data:

20:08:26,994 ERROR [org.alfresco.repo.domain.schema.SchemaBootstrap] Statement execution failed:
SQL: CREATE INDEX idx_avm_hl_revpk ON avm_history_links (descendent, ancestor)
Error: ORA-00955: name is already used by an existing object

File: G:\ALF-2351_upg\227\tomcat\temp\Alfresco\AlfrescoSchemaUpdate-org.alfresco.repo.domain.hibernate.dialect.AlfrescoOracle9Dialect-59229892731105266.sql
Line: 1,291
20:08:26,994 ERROR [org.alfresco.repo.domain.schema.SchemaBootstrap] Schema auto-update failed
java.sql.SQLException: ORA-00955: name is already used by an existing object
. . .
20:08:26,994 ERROR [org.springframework.web.context.ContextLoader] Context initialization failed
org.alfresco.error.AlfrescoRuntimeException: Schema auto-update failed
. . .
Caused by: java.sql.SQLException: ORA-00955: name is already used by an existing object

(please find full log in attach)

• Clean upgrades are performed successfully with both with Oracle 10g and Oracle 11g (Windows Server 2003 32-bit, Windows Server 2008 64-bit, Solaris 10).
• Works fine with MySQL 5.1: both clean upgrade and with generated data one.
• FULL index recovery (index.recovery.mode=FULL) enabled during upgrade doesn't solve the issue as well.

DB versions used:
• Oracle 10.2.0.3.0
• Oracle 11.1.0.7.0
• MySQL 5.1.41

Upgrade data template used for upgrade test with data is avaialble here on svn:
https://svn.alfresco.com/repos/qa/Other/Alfresco_Upgrade/template.properties

All the upgrade logs attached (please see attach and screen with tested configurations).