diff --git a/awx/api/serializers.py b/awx/api/serializers.py
index f4aab86136..22ca4b6490 100644
--- a/awx/api/serializers.py
+++ b/awx/api/serializers.py
@@ -2274,6 +2274,7 @@ class BulkHostCreateSerializer(serializers.Serializer):
         return attrs
 
     def create(self, validated_data):
+        # DAB: dedupe Validation rejected (child BulkHostSerializer is_valid) vs ORM bypass bulk_create.
         with serializer_mediated_persistence_context():
             return self._create_bulk_hosts(validated_data)
 
@@ -5282,6 +5283,7 @@ class BulkJobLaunchSerializer(PromptFieldCleanTextMixin, serializers.Serializer)
             )
 
     def create(self, validated_data):
+        # DAB: dedupe Validation rejected (is_valid) vs audit_workflow_job_nodes / bulk_create bypass logs.
         with serializer_mediated_persistence_context():
             return self._create_bulk_job_launch(validated_data)
 
diff --git a/awx/main/utils/validation_bypass_observability.py b/awx/main/utils/validation_bypass_observability.py
index 7725eb3277..7c4c83a1f2 100644
--- a/awx/main/utils/validation_bypass_observability.py
+++ b/awx/main/utils/validation_bypass_observability.py
@@ -61,6 +61,11 @@ def audit_workflow_job_nodes_for_bulk_create(nodes: Iterable[Model]) -> None:
     columns. Node prompt values (limit, job_tags, etc.) live in ``char_prompts`` via
     ``NullablePromptPseudoField`` and must be read with ``getattr`` after deferred
     attrs are applied on the in-memory instances.
+
+    When called from a DRF ``create()`` after ``is_valid()``, the caller must run
+    inside DAB ``serializer_mediated_persistence_context`` so duplicate
+    ``Validation rejected`` / ``ORM bypass`` lines are not emitted (see DAB
+    ``docs/lib/validation_bypass_observability.md``).
     """
     materialized = list(nodes)
     if not materialized: