Fix a bug in pending_tasks

feudal/backend/models/__init__.py

@@ -67,10 +67,13 @@ class Site(models.Model):
     def pending_tasks(self):
         tasks = {}
 
+        # ignores orphaned deployment states
         dep_states = [
             state
             for state in self.state_items.all()
-            if state.is_pending or state.is_credential_pending
+            if (
+                state.is_pending or state.is_credential_pending
+            ) and state.parent is not None
         ]
 
         # make the tasks unique here