--- a/Allura/allura/model/project.py
+++ b/Allura/allura/model/project.py
@@ -159,6 +159,7 @@
     trove_topic=FieldProperty([S.ObjectId])
     trove_natlanguage=FieldProperty([S.ObjectId])
     trove_environment=FieldProperty([S.ObjectId])
+    tracking_id = FieldProperty(str, if_missing='')
 
     @property
     def permissions(self):