diff --git a/gluon/contrib/redis_session.py b/gluon/contrib/redis_session.py
index b0971551..2daa8184 100644
--- a/gluon/contrib/redis_session.py
+++ b/gluon/contrib/redis_session.py
@@ -185,7 +185,8 @@ class MockQuery(object):
             if self.with_lock:
                 acquire_lock(self.db, key + ':lock', self.value)
             rtn = self.db.hgetall(key)
-            rtn['update_record'] = self.update  # update record support
+            if rtn:
+                rtn['update_record'] = self.update  # update record support
             return [Storage(rtn)] if rtn else []
         elif self.op == 'ge' and self.field == 'id' and self.value == 0:
             #means that someone wants the complete list
diff --git a/gluon/globals.py b/gluon/globals.py
index 6ea2ebc4..b387336b 100644
--- a/gluon/globals.py
+++ b/gluon/globals.py
@@ -915,7 +915,7 @@ class Session(Storage):
                 return
             (record_id, sep, unique_key) = response.session_id.partition(':')
 
-            if record_id.isdigit() and long(record_id):
+            if record_id.isdigit() and long(record_id)>0:
                 new_unique_key = web2py_uuid()
                 row = table(record_id)
                 if row and row.unique_key==unique_key: