diff -r 34e6d07ea2e9 -r 29b1aaf9e080 src/pyams_content/shared/common/__init__.py
--- a/src/pyams_content/shared/common/__init__.py	Tue Nov 06 14:40:22 2018 +0100
+++ b/src/pyams_content/shared/common/__init__.py	Wed Nov 07 17:29:16 2018 +0100
@@ -142,8 +142,9 @@
 
     @property
     def first_owner(self):
-        versions = IWorkflowVersions(self)
-        return versions.get_version(1).creator
+        versions = IWorkflowVersions(self, None)
+        if versions is not None:
+            return versions.get_version(1).creator
 
     @property
     def creation_label(self):