fix

submission/migrations/0006_alter_submission_id.py

@@ -0,0 +1,19 @@
+# Generated by Django 5.1.6 on 2025-03-18 11:29
+
+import uuid
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('submission', '0005_alter_submission_options'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='submission',
+            name='id',
+            field=models.UUIDField(default=uuid.uuid4, editable=False, primary_key=True, serialize=False, unique=True),
+        ),
+    ]

submission/models.py

@@ -7,7 +7,12 @@ from task.models import Task
 
 
 class Submission(TimeStampedModel):
-    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
+    id = models.UUIDField(
+        primary_key=True,
+        default=uuid.uuid4,
+        editable=False,
+        unique=True,
+    )
     user = models.ForeignKey(
         User,
         on_delete=models.CASCADE,