diff --git a/Main/migrations/0004_alter_settask_set.py b/Main/migrations/0004_alter_settask_set.py
new file mode 100644
index 0000000..09d9638
--- /dev/null
+++ b/Main/migrations/0004_alter_settask_set.py
@@ -0,0 +1,23 @@
+# Generated by Django 3.2.4 on 2021-11-21 20:59
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("Main", "0003_auto_20211121_2327"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="settask",
+            name="set",
+            field=models.ForeignKey(
+                on_delete=django.db.models.deletion.CASCADE,
+                related_name="settasks",
+                to="Main.set",
+            ),
+        ),
+    ]
diff --git a/Main/migrations/0005_task_editors.py b/Main/migrations/0005_task_editors.py
new file mode 100644
index 0000000..68144dd
--- /dev/null
+++ b/Main/migrations/0005_task_editors.py
@@ -0,0 +1,19 @@
+# Generated by Django 3.2.4 on 2021-12-07 13:03
+
+import django.contrib.postgres.fields
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('Main', '0004_alter_settask_set'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='task',
+            name='editors',
+            field=django.contrib.postgres.fields.ArrayField(base_field=models.TextField(), default=list, size=None),
+        ),
+    ]
diff --git a/Main/migrations/0006_solution_test.py b/Main/migrations/0006_solution_test.py
new file mode 100644
index 0000000..6e54a99
--- /dev/null
+++ b/Main/migrations/0006_solution_test.py
@@ -0,0 +1,18 @@
+# Generated by Django 3.2.4 on 2021-12-19 10:47
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('Main', '0005_task_editors'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='solution',
+            name='test',
+            field=models.IntegerField(default=None, null=True),
+        ),
+    ]
diff --git a/Main/models/solution.py b/Main/models/solution.py
index 847115e..7a96fe0 100644
--- a/Main/models/solution.py
+++ b/Main/models/solution.py
@@ -19,7 +19,7 @@ class Solution(models.Model):
     language_id = models.IntegerField(default=0)
     time_sent = models.DateTimeField(default=timezone.now)
     result = models.TextField(default=CONSTS["in_queue_status"])
-    test = models.IntegerField(default=None)
+    test = models.IntegerField(default=None, null=True)
 
     @property
     def language(self):