diff --git a/planetstack/core/models/plcorebase.py b/planetstack/core/models/plcorebase.py
index d461c9d..4263f94 100644
--- a/planetstack/core/models/plcorebase.py
+++ b/planetstack/core/models/plcorebase.py
@@ -98,25 +98,31 @@
     def delete(self, *args, **kwds):
         # so we have something to give the observer
         purge = kwds.get('purge',False)
+        silent = kwds.get('silent',False)
         try:
             purge = purge or observer_disabled
         except NameError:
             pass
-            
+
         if (purge):
             del kwds['purge']
             super(PlCoreBase, self).delete(*args, **kwds)
         else:
             self.deleted = True
             self.enacted=None
-            self.save(update_fields=['enacted','deleted'])
-
+            self.save(update_fields=['enacted','deleted'], silent=silent)
 
     def save(self, *args, **kwargs):
+        if "silent" in kwargs:
+            silent=kwargs.pop("silent")
+        else:
+            silent=False
+
         super(PlCoreBase, self).save(*args, **kwargs)
 
         # This is a no-op if observer_disabled is set
-        notify_observer()
+        if not silent:
+            notify_observer()
 
         self.__initial = self._dict
 
diff --git a/planetstack/hpc_observer/steps/sync_cdnprefix.py b/planetstack/hpc_observer/steps/sync_cdnprefix.py
index adb95db..b773df9 100644
--- a/planetstack/hpc_observer/steps/sync_cdnprefix.py
+++ b/planetstack/hpc_observer/steps/sync_cdnprefix.py
@@ -24,6 +24,20 @@
         SyncStep.__init__(self, **args)
         HpcLibrary.__init__(self)
 
+    def fetch_pending(self, deleted):
+        self.sanity_check()
+
+        return SyncStep.fetch_pending(self, deleted)
+
+    def sanity_check(self):
+        # sanity check to make sure our PS objects have CMI objects behind them
+        all_p_ids = [x["cdn_prefix_id"] for x in self.client.onev.ListAll("CDNPrefix")]
+        for p in CDNPrefix.objects.all():
+            if (p.cdn_prefix_id is not None) and (p.cdn_prefix_id not in all_p_ids):
+                logger.info("CDN Prefix %s was not found on CMI" % p.cdn_prefix_id)
+                p.cdn_prefix_id=None
+                p.save()
+
     def sync_record(self, cp):
         logger.info("sync'ing cdn prefix %s" % str(cp))
 
diff --git a/planetstack/hpc_observer/steps/sync_contentprovider.py b/planetstack/hpc_observer/steps/sync_contentprovider.py
index e10dca9..c7335d6 100644
--- a/planetstack/hpc_observer/steps/sync_contentprovider.py
+++ b/planetstack/hpc_observer/steps/sync_contentprovider.py
@@ -24,6 +24,20 @@
         SyncStep.__init__(self, **args)
         HpcLibrary.__init__(self)
 
+    def fetch_pending(self, deleted):
+        self.sanity_check()
+
+        return SyncStep.fetch_pending(self, deleted)
+
+    def sanity_check(self):
+        # sanity check to make sure our PS objects have CMI objects behind them
+        all_cp_ids = [x["content_provider_id"] for x in self.client.onev.ListAll("ContentProvider")]
+        for cp in ContentProvider.objects.all():
+            if (cp.content_provider_id is not None) and (cp.content_provider_id not in all_cp_ids):
+                logger.info("Content provider %s was not found on CMI" % cp.content_provider_id)
+                cp.content_provider_id=None
+                cp.save()
+
     def sync_record(self, cp):
         logger.info("sync'ing content provider %s" % str(cp))
         account_name = self.make_account_name(cp.name)
diff --git a/planetstack/hpc_observer/steps/sync_originserver.py b/planetstack/hpc_observer/steps/sync_originserver.py
index 4f0ba4c..6fb6234 100644
--- a/planetstack/hpc_observer/steps/sync_originserver.py
+++ b/planetstack/hpc_observer/steps/sync_originserver.py
@@ -24,6 +24,23 @@
         SyncStep.__init__(self, **args)
         HpcLibrary.__init__(self)
 
+    def fetch_pending(self, deleted):
+        self.sanity_check()
+
+        return SyncStep.fetch_pending(self, deleted)
+
+    def sanity_check(self):
+        # sanity check to make sure our PS objects have CMI objects behind them
+        all_ors_ids = [x["origin_server_id"] for x in self.client.onev.ListAll("OriginServer")]
+        for ors in OriginServer.objects.all():
+            if (ors.origin_server_id is not None) and (ors.origin_server_id not in all_ors_ids):
+                # we have an origin server ID, but it doesn't exist in the CMI
+                # something went wrong
+                # start over
+                logger.info("origin server %s was not found on CMI" % ors.origin_server_id)
+                ors.origin_server_id=None
+                ors.save()
+
     def sync_record(self, ors):
         logger.info("sync'ing origin server %s" % str(ors))
 
diff --git a/planetstack/hpc_observer/steps/sync_serviceprovider.py b/planetstack/hpc_observer/steps/sync_serviceprovider.py
index 36f2689..19c6db3 100644
--- a/planetstack/hpc_observer/steps/sync_serviceprovider.py
+++ b/planetstack/hpc_observer/steps/sync_serviceprovider.py
@@ -24,6 +24,20 @@
         SyncStep.__init__(self, **args)
         HpcLibrary.__init__(self)
 
+    def fetch_pending(self, deleted):
+        self.sanity_check()
+
+        return SyncStep.fetch_pending(self, deleted)
+
+    def sanity_check(self):
+        # sanity check to make sure our PS objects have CMI objects behind them
+        all_sp_ids = [x["service_provider_id"] for x in self.client.onev.ListAll("ServiceProvider")]
+        for sp in ServiceProvider.objects.all():
+            if (sp.service_provider_id is not None) and (sp.service_provider_id not in all_sp_ids):
+                logger.info("Service provider %s was not found on CMI" % sp.service_provider_id)
+                sp.service_provider_id=None
+                sp.save()
+
     def sync_record(self, sp):
         logger.info("sync'ing service provider %s" % str(sp))
         account_name = self.make_account_name(sp.name)