diff --git a/ax/storage/sqa_store/utils.py b/ax/storage/sqa_store/utils.py
index 7264dde8256..836ce459734 100644
--- a/ax/storage/sqa_store/utils.py
+++ b/ax/storage/sqa_store/utils.py
@@ -38,6 +38,9 @@
     "_steps",
     "analysis_scheduler",
     "_nodes",
+    # For auxiliary experiments, we don't expect any updates, so we
+    # don't need to recur into them during `copy_db_ids`.
+    "auxiliary_experiments_by_purpose",
 }
 SKIP_ATTRS_ERROR_SUFFIX = "Consider adding to COPY_DB_IDS_ATTRS_TO_SKIP if appropriate."