diff -r fb0041aa74d3 -r 95536fa18d0d server/python2/django/renkanmanager/models.py
--- a/server/python2/django/renkanmanager/models.py	Mon Jan 11 18:24:14 2016 +0100
+++ b/server/python2/django/renkanmanager/models.py	Tue Jan 26 17:18:04 2016 +0100
@@ -70,7 +70,7 @@
     
     revision_guid = models.CharField(max_length=256, default=uuid.uuid4, unique=True) # typically UUID
     parent_renkan_guid = models.CharField(max_length=256)
-    title = models.CharField(max_length=1024, null=True)
+    title = models.CharField(max_length=1024, null=True, blank=True)
     content = models.TextField(blank=True, null=True)
     creator = models.ForeignKey(auth_user_model, blank=True, null=True, related_name="revision_creator")
     last_updated_by = models.ForeignKey(auth_user_model, blank=True, null=True, related_name="revision_last_updated_by")