ADD:lock

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