diff --git a/direct/src/distributed/ClientRepositoryBase.py b/direct/src/distributed/ClientRepositoryBase.py
index c66aca6ee3..031e12e385 100644
--- a/direct/src/distributed/ClientRepositoryBase.py
+++ b/direct/src/distributed/ClientRepositoryBase.py
@@ -426,6 +426,8 @@ class ClientRepositoryBase(ConnectionRepository):
         if self.doId2ownerView.has_key(doId):
             # ...it is in our dictionary.
             # Just update it.
+            self.notify.error('duplicate owner generate for %s (%s)' % (
+                doId, dclass.getName()))
             distObj = self.doId2ownerView[doId]
             assert distObj.dclass == dclass
             distObj.generate()