NULL XWL_ID after import of enterprise xar

Description
Using Oracle 11gR2 I tried to stand up a XWiki Enterprise 2.6 in a tomcat container. Upon Import there was an error of three pages: Main.Activity, Main.Spaces, XWiki.SharePage. It was orginally thought that this was related to a similar error involving JIRA Issue: http://jira.xwiki.org/jira/browse/XWIKI-5668 which turned out not to be the case.

Error:
Listed here is the out put of the errors which occurred at the time of import. http://kvirc.pastebin.com/0gfZYAvg

Debug Process:

1. Restart the container.
2. Re-import the 2.6 .xar file; restart the container
3. Drop XWiki tables in DB, Delete XWiki 2.6 from the web-server
4. Install and configure XWiki 2.6 # Import 2.6 xar once more (reproduced the same error)
5. Drop Xwiki tables from DB, and Delete XWiki 2.6 from web-server
6. Install and configure XWiki 2.6
7. Import 2.5 xar on 2.6 framework (problem is unseen, possible work around)

IRC log
The Issue was discussed in IRC starting at time:2010-12-9 17:05:02Z ending at time:2010-12-9 18:14:42Z

Possible Conclusion
There must be a latent compatibility bug in the storage engine which was exposed when the .xar was changed for v2.6 (taken from IRC)