by Luis de Vasconcelos.
I'm not sure if it will work in 1.9 but go to:
http://yourschool.com/admin/xmldb/
What do you see? You should see some links like:
[Reserved words] [Doc] [Check indexes] [Check defaults] [Check foreign keys]
If you do, click the Check indexes an Check foreign keys links as see if you key any violation messages.