--- a/devtools/testlib.py	Wed Oct 13 08:36:38 2010 +0200
+++ b/devtools/testlib.py	Wed Oct 13 08:37:21 2010 +0200
@@ -914,6 +914,7 @@
             except ValidationError, ex:
                 # failed to satisfy some constraint
                 print 'error in automatic db population', ex
+                self.session.commit_state = None # reset uncommitable flag
         self.post_populate(cu)
         self.commit()