diff -r e6b8931abe17 -r bf0d8df2aefb server/migractions.py
--- a/server/migractions.py	Mon Apr 07 12:28:25 2014 +0200
+++ b/server/migractions.py	Tue Apr 01 10:28:16 2014 +0200
@@ -93,7 +93,7 @@
             assert repo
             self.cnx = cnx
             self.repo = repo
-            self.session = repo._get_session(cnx.sessionid)
+            self.session = cnx._session
         elif connect:
             self.repo_connect()
             self.set_session()