fix: Update Python Den level 15 model solution (#1736)

game/migrations/0103_level_1015_solution.py

@@ -0,0 +1,26 @@
+from django.apps.registry import Apps
+from django.db import migrations
+
+
+def update_level_model_solution(apps: Apps, *args):
+    Level = apps.get_model("game", "Level")
+    level43 = Level.objects.get(name="1015", default=True)
+    level43.model_solution = "[11,12]"
+    level43.save()
+
+
+def revert_level_model_solution(apps: Apps, *args):
+    Level = apps.get_model("game", "Level")
+    level43 = Level.objects.get(name="1015", default=True)
+    level43.model_solution = "[11]"
+    level43.save()
+
+
+class Migration(migrations.Migration):
+    dependencies = [("game", "0102_reoder_episodes_13_14")]
+    operations = [
+        migrations.RunPython(
+            update_level_model_solution,
+            reverse_code=revert_level_model_solution,
+        )
+    ]