--- a/schemas/base.py	Fri Sep 23 09:17:37 2011 +0200
+++ b/schemas/base.py	Fri Sep 23 14:18:13 2011 +0200
@@ -306,7 +306,6 @@
 
 class CWSourceSchemaConfig(EntityType):
     __permissions__ = ENTITY_MANAGERS_PERMISSIONS
-    __unique_together__ = [('cw_for_source', 'cw_schema')]
     cw_for_source = SubjectRelation(
         'CWSource', inlined=True, cardinality='1*', composite='object',
         __permissions__=RELATION_MANAGERS_PERMISSIONS)