--- a/server/schemaserial.py	Thu Jun 27 08:52:15 2013 +0200
+++ b/server/schemaserial.py	Wed Jan 22 15:49:32 2014 +0100
@@ -89,7 +89,7 @@
     repo = session.repo
     dbhelper = repo.system_source.dbhelper
     # XXX bw compat (3.6 migration)
-    sqlcu = session.cnxset['system']
+    sqlcu = session.cnxset.cu
     sqlcu.execute("SELECT * FROM cw_CWRType WHERE cw_name='symetric'")
     if sqlcu.fetchall():
         sql = dbhelper.sql_rename_col('cw_CWRType', 'cw_symetric', 'cw_symmetric',