ADD:lock

@@ -10,6 +10,7 @@ import traceback
 from collections import Counter
 from datetime import datetime, date
 from django import db
+from django.db import transaction
 from django.utils import timezone
 from django.core.management import BaseCommand
 from multiprocessing import Process, Queue, Manager, Lock
@@ -2034,7 +2035,8 @@ class Command(BaseCommand, LoggerMixin):
                                         result_class = HILOCRResult if is_ca else HILSEOCRResult
                                     else:
                                         result_class = AFCOCRResult if is_ca else AFCSEOCRResult
-                                    res_obj = result_class.objects.filter(application_id=doc.application_id).first()
+                                    res_obj = result_class.objects.select_for_update().filter(application_id=doc.application_id).first()
+                                    with transaction.atomic():
                                         if res_obj is None:
                                             res_obj = result_class()
                                             res_obj.application_id = doc.application_id