bug: use deepcopy

Co-authored-by: Zacharias Zacharodimos <[email protected]>

invenio_rdm_records/services/pids/tasks.py

@@ -7,7 +7,7 @@
 
 """RDM PIDs Service tasks."""
 
-from copy import copy
+from copy import deepcopy
 
 from celery import shared_task
 from invenio_access.permissions import system_identity
@@ -31,6 +31,6 @@ def cleanup_parent_pids(recid):
     """Clean up parent PIDs."""
     record_cls = current_rdm_records.records_service
     record = record_cls.pid.resolve(recid)
-    parent_pids = copy(record.parent.get("pids", {}))
+    parent_pids = deepcopy(record.parent.get("pids", {}))
     if record_cls.next_latest_published_record_by_parent(record.parent) is None:
         record_cls.pids.parent_pid_manager.discard_all(parent_pids, soft_delete=True)