diff --git a/core/src/zeit/cms/__init__.py b/core/src/zeit/cms/__init__.py
index 7c84e55191..f28cff0536 100644
--- a/core/src/zeit/cms/__init__.py
+++ b/core/src/zeit/cms/__init__.py
@@ -1 +1 @@
-__version__ = '6.39.0'
+__version__ = '6.40.0.dev0'
\ No newline at end of file
diff --git a/core/src/zeit/connector/models.py b/core/src/zeit/connector/models.py
index 83b8ae6b6d..e3e4eb38ea 100644
--- a/core/src/zeit/connector/models.py
+++ b/core/src/zeit/connector/models.py
@@ -216,6 +216,7 @@ def from_webdav(self, props):
                 value = props.get((name, self.NS + namespace), self)
                 if value is not self:
                     setattr(self, column.name, value)
+                    props.pop((name, self.NS + namespace), None)
 
         unsorted = collections.defaultdict(dict)
         for (k, ns), v in props.items():