diff --git a/awx/api/serializers.py b/awx/api/serializers.py
index 8b95bfc954..0f6e7410f6 100644
--- a/awx/api/serializers.py
+++ b/awx/api/serializers.py
@@ -608,7 +608,11 @@ class UnifiedJobSerializer(BaseSerializer):
         summary_fields = super(UnifiedJobSerializer, self).get_summary_fields(obj)
         if obj.spawned_by_workflow:
             summary_fields['source_workflow_job'] = {}
-            summary_obj = obj.unified_job_node.workflow_job
+            try:
+                summary_obj = obj.unified_job_node.workflow_job
+            except UnifiedJob.unified_job_node.RelatedObjectDoesNotExist:
+                return summary_fields
+
             for field in SUMMARIZABLE_FK_FIELDS['job']:
                 val = getattr(summary_obj, field, None)
                 if val is not None:
diff --git a/awx/main/models/unified_jobs.py b/awx/main/models/unified_jobs.py
index 63c3e3196a..31afe69d32 100644
--- a/awx/main/models/unified_jobs.py
+++ b/awx/main/models/unified_jobs.py
@@ -780,13 +780,19 @@ class UnifiedJob(PolymorphicModel, PasswordFieldsModel, CommonModelNameNotUnique
     @property
     def workflow_job_id(self):
         if self.spawned_by_workflow:
-            return self.unified_job_node.workflow_job.pk
+            try:
+                return self.unified_job_node.workflow_job.pk
+            except UnifiedJob.unified_job_node.RelatedObjectDoesNotExist:
+                pass
         return None
 
     @property
     def workflow_node_id(self):
         if self.spawned_by_workflow:
-            return self.unified_job_node.pk
+            try:
+                return self.unified_job_node.pk
+            except UnifiedJob.unified_job_node.RelatedObjectDoesNotExist:
+                pass
         return None
 
     @property