Change created_at auto_now to auto_now_add (#2378)

Author: susilnem

local_units/migrations/0020_alter_localunit_created_at.py

@@ -0,0 +1,18 @@
+# Generated by Django 4.2.16 on 2025-01-07 06:30
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("local_units", "0019_localunit_last_sent_validator_type"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="localunit",
+            name="created_at",
+            field=models.DateTimeField(auto_now_add=True, verbose_name="Created at"),
+        ),
+    ]

local_units/models.py

@@ -307,7 +307,7 @@ class DeprecateReason(models.IntegerChoices):
     )
     local_branch_name = models.CharField(max_length=255, null=True, blank=True, verbose_name=_("Branch name in local language"))
     english_branch_name = models.CharField(max_length=255, null=True, blank=True, verbose_name=_("Branch name in English"))
-    created_at = models.DateTimeField(verbose_name=_("Created at"), auto_now=True)
+    created_at = models.DateTimeField(verbose_name=_("Created at"), auto_now_add=True)
     modified_at = models.DateTimeField(verbose_name=_("Modified at"), auto_now=True)
     created_by = models.ForeignKey(
         settings.AUTH_USER_MODEL,