--- a/server/hooks.py	Mon Feb 08 10:06:40 2010 +0100
+++ b/server/hooks.py	Mon Feb 08 13:02:05 2010 +0100
@@ -58,8 +58,6 @@
     if _UNIQUE_CONSTRAINTS_HOLDER is session:
         _UNIQUE_CONSTRAINTS_HOLDER = None
         _UNIQUE_CONSTRAINTS_LOCK.release()
-    else:
-        assert _UNIQUE_CONSTRAINTS_HOLDER is None
 
 
 def relation_deleted(session, eidfrom, rtype, eidto):