diff --git a/gluon/globals.py b/gluon/globals.py
index 59a2f2d4..b98fe306 100644
--- a/gluon/globals.py
+++ b/gluon/globals.py
@@ -973,9 +973,12 @@ class Session(Storage):
                     if row:
                         # rows[0].update_record(locked=True)
                         # Unpickle the data
-                        session_data = pickle.loads(row['session_data'])
-                        self.update(session_data)
-                        response.session_new = False
+                        try:
+                            session_data = pickle.loads(row['session_data'])
+                            self.update(session_data)
+                            response.session_new = False
+                        except:
+                            record_id = None
                     else:
                         record_id = None
                 if record_id:
diff --git a/gluon/packages/dal b/gluon/packages/dal
index f74a107e..f9c870bb 160000
--- a/gluon/packages/dal
+++ b/gluon/packages/dal
@@ -1 +1 @@
-Subproject commit f74a107e00473b3d18ee407f83ab864753770d15
+Subproject commit f9c870bb3d009b0daad66f36933f07f1f582cf43