[videos] Fix saving imdb_id duplicates

vrobbler/apps/videos/migrations/0025_add_imdb_id_unique.py

@@ -0,0 +1,24 @@
+# Generated by Django 4.2.29 on 2026-03-21 18:29
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("videos", "0024_remove_video_run_time_seconds_and_more"),
+    ]
+
+    operations = [
+        migrations.AlterUniqueTogether(
+            name="video",
+            unique_together=set(),
+        ),
+        migrations.AlterField(
+            model_name="video",
+            name="imdb_id",
+            field=models.CharField(
+                blank=True, max_length=20, null=True, unique=True
+            ),
+        ),
+    ]