Hello XWiki experts,
 with our XWiki 1.5 I encounter the following complaint at trying to
 save the document of a user, even after a restart of the servlet
 container:
  org.hibernate.StaleObjectStateException: Row was
updated or deleted
 by another transaction (or unsaved-value mapping was incorrect):
 [com.xpn.xwiki.objects.StringProperty#<?xml version="1.0"
 encoding="UTF-8"?>
 <eduLevelFine></eduLevelFine>
 ]
          at
 org
 .hibernate
 .persister
 .entity.AbstractEntityPersister.check(AbstractEntityPersister.java:
 1765) 
 I am puzzled and have no idea where to go except into SQL, which is
 not really a safe thing.