diff --git a/label_studio/tasks/migrations/0051_tasklock_created_at.py b/label_studio/tasks/migrations/0051_tasklock_created_at.py
index 102c133a083e..6bf33dff54d9 100644
--- a/label_studio/tasks/migrations/0051_tasklock_created_at.py
+++ b/label_studio/tasks/migrations/0051_tasklock_created_at.py
@@ -1,4 +1,4 @@
-# Generated by Django 4.2.16 on 2024-10-30 17:56
+# Generated by Django 4.2.16 on 2024-11-04 10:37
 
 from django.db import migrations, models
 
@@ -13,6 +13,6 @@ class Migration(migrations.Migration):
         migrations.AddField(
             model_name='tasklock',
             name='created_at',
-            field=models.DateTimeField(auto_now_add=True, help_text='Creation time', null=True, verbose_name='created at'),
+            field=models.DateTimeField(blank=True, default=None, help_text='Creation time', null=True, verbose_name='created_at'),
         ),
     ]
diff --git a/label_studio/tasks/migrations/0052_auto_20241030_1757.py b/label_studio/tasks/migrations/0052_auto_20241030_1757.py
index ff8fd2662d9d..0f7d7c79b7b7 100644
--- a/label_studio/tasks/migrations/0052_auto_20241030_1757.py
+++ b/label_studio/tasks/migrations/0052_auto_20241030_1757.py
@@ -1,6 +1,6 @@
 # Generated by Django 4.2.16 on 2024-10-30 17:57
 
-from django.db import migrations
+from django.db import migrations, models
 from django.db import connection
 from django.conf import settings
 
@@ -53,6 +53,11 @@ class Migration(migrations.Migration):
     ]
 
     operations = [
+        migrations.AlterField(
+            model_name='tasklock',
+            name='created_at',
+            field=models.DateTimeField(auto_now_add=True, help_text='Creation time', null=True, verbose_name='created at'),
+        ),
         migrations.RunPython(forwards, backwards),
     ]