Fix unique date field on snapshots

nummi/main/migrations/0012_alter_snapshot_date.py

@@ -0,0 +1,19 @@
+# Generated by Django 4.1.4 on 2022-12-29 18:22
+
+import datetime
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("main", "0011_alter_category_user_alter_invoice_user_and_more"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="snapshot",
+            name="date",
+            field=models.DateField(default=datetime.date.today, verbose_name="Date"),
+        ),
+    ]

nummi/main/models.py

@@ -189,7 +189,7 @@ def snapshot_path(instance, filename):
 
 class Snapshot(UserModel):
     id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
-    date = models.DateField(default=date.today, unique=True, verbose_name=_("Date"))
+    date = models.DateField(default=date.today, verbose_name=_("Date"))
     value = models.DecimalField(
         max_digits=12, decimal_places=2, default=0, verbose_name=_("Value")
     )