diff --git a/netbox/extras/migrations/0092_delete_jobresult.py b/netbox/extras/migrations/0092_delete_jobresult.py
index c1b121c69..e794ba616 100644
--- a/netbox/extras/migrations/0092_delete_jobresult.py
+++ b/netbox/extras/migrations/0092_delete_jobresult.py
@@ -1,6 +1,8 @@
 # Generated by Django 4.1.7 on 2023-03-27 17:31
 
-from django.db import migrations
+import django.core.validators
+from django.db import migrations, models
+import re
 
 
 class Migration(migrations.Migration):
@@ -13,4 +15,24 @@ class Migration(migrations.Migration):
         migrations.DeleteModel(
             name='JobResult',
         ),
+        migrations.AlterField(
+            model_name='customfield',
+            name='name',
+            field=models.CharField(
+                max_length=50,
+                unique=True,
+                validators=[
+                    django.core.validators.RegexValidator(
+                        flags=re.RegexFlag['IGNORECASE'],
+                        message='Only alphanumeric characters and underscores are allowed.',
+                        regex='^[a-z0-9_]+$',
+                    ),
+                    django.core.validators.RegexValidator(
+                        flags=re.RegexFlag['IGNORECASE'],
+                        message='No double-underscores are allowed.',
+                        regex='^(?!.*__.*)',
+                    ),
+                ],
+            ),
+        ),
     ]
diff --git a/netbox/extras/migrations/0093_alter_customfield_name.py b/netbox/extras/migrations/0093_alter_customfield_name.py
deleted file mode 100644
index dfdcd2ec3..000000000
--- a/netbox/extras/migrations/0093_alter_customfield_name.py
+++ /dev/null
@@ -1,29 +0,0 @@
-# Generated by Django 4.1.8 on 2023-05-08 15:57
-
-import django.core.validators
-from django.db import migrations, models
-import re
-
-
-class Migration(migrations.Migration):
-    dependencies = [
-        ('extras', '0092_delete_jobresult'),
-    ]
-
-    operations = [
-        migrations.AlterField(
-            model_name='customfield',
-            name='name',
-            field=models.CharField(
-                max_length=50,
-                unique=True,
-                validators=[
-                    django.core.validators.RegexValidator(
-                        flags=re.RegexFlag['IGNORECASE'],
-                        message='Only alphanumeric characters and underscores (no double-underscores) are allowed.',
-                        regex='^(?!.*__.*)^[a-z0-9_]+$',
-                    )
-                ],
-            ),
-        ),
-    ]
diff --git a/netbox/extras/models/customfields.py b/netbox/extras/models/customfields.py
index 635f9c882..c951a5675 100644
--- a/netbox/extras/models/customfields.py
+++ b/netbox/extras/models/customfields.py
@@ -81,8 +81,13 @@ class CustomField(CloningMixin, ExportTemplatesMixin, ChangeLoggedModel):
         help_text=_('Internal field name'),
         validators=(
             RegexValidator(
-                regex=r'^(?!.*__.*)^[a-z0-9_]+$',
-                message="Only alphanumeric characters and underscores (no double-underscores) are allowed.",
+                regex=r'^[a-z0-9_]+$',
+                message="Only alphanumeric characters and underscores are allowed.",
+                flags=re.IGNORECASE
+            ),
+            RegexValidator(
+                regex=r'^(?!.*__.*)',
+                message="No double-underscores are allowed.",
                 flags=re.IGNORECASE
             ),
         )