diff --git a/netbox/virtualization/migrations/0039_convert_disk_size.py b/netbox/virtualization/migrations/0039_convert_disk_size.py
deleted file mode 100644
index 5bd6c13de..000000000
--- a/netbox/virtualization/migrations/0039_convert_disk_size.py
+++ /dev/null
@@ -1,23 +0,0 @@
-# Generated by Django 5.0.6 on 2024-06-06 17:46
-
-from django.db import migrations
-from django.db.models import F
-
-
-def convert_disk_size(apps, schema_editor):
-    VirtualMachine = apps.get_model('virtualization', 'VirtualMachine')
-    VirtualMachine.objects.filter(disk__isnull=False).update(disk=F('disk') * 1000)
-
-
-class Migration(migrations.Migration):
-
-    dependencies = [
-        ('virtualization', '0038_virtualdisk'),
-    ]
-
-    operations = [
-        migrations.RunPython(
-            code=convert_disk_size,
-            reverse_code=migrations.RunPython.noop
-        ),
-    ]
diff --git a/netbox/virtualization/migrations/0040_virtualmachine_serial_number.py b/netbox/virtualization/migrations/0039_virtualmachine_serial_number.py
similarity index 74%
rename from netbox/virtualization/migrations/0040_virtualmachine_serial_number.py
rename to netbox/virtualization/migrations/0039_virtualmachine_serial_number.py
index 5ca72d66d..15b58fa22 100644
--- a/netbox/virtualization/migrations/0040_virtualmachine_serial_number.py
+++ b/netbox/virtualization/migrations/0039_virtualmachine_serial_number.py
@@ -1,12 +1,10 @@
-# Generated by Django 5.0.6 on 2024-06-04 17:09
-
 from django.db import migrations, models
 
 
 class Migration(migrations.Migration):
 
     dependencies = [
-        ('virtualization', '0039_convert_disk_size'),
+        ('virtualization', '0038_virtualdisk'),
     ]
 
     operations = [
diff --git a/netbox/virtualization/migrations/0041_convert_disk_size.py b/netbox/virtualization/migrations/0040_convert_disk_size.py
similarity index 65%
rename from netbox/virtualization/migrations/0041_convert_disk_size.py
rename to netbox/virtualization/migrations/0040_convert_disk_size.py
index dd3f4c0ca..6471a0908 100644
--- a/netbox/virtualization/migrations/0041_convert_disk_size.py
+++ b/netbox/virtualization/migrations/0040_convert_disk_size.py
@@ -1,26 +1,26 @@
-# Generated by Django 5.0.7 on 2024-07-31 05:40
-
 from django.db import migrations
 from django.db.models import F, Sum
 
 
 def convert_disk_size(apps, schema_editor):
+    VirtualMachine = apps.get_model('virtualization', 'VirtualMachine')
+    VirtualMachine.objects.filter(disk__isnull=False).update(disk=F('disk') * 1000)
+
     VirtualDisk = apps.get_model('virtualization', 'VirtualDisk')
     VirtualDisk.objects.filter(size__isnull=False).update(size=F('size') * 1000)
 
-    # Need to save all Vms to recalc disk size
+    # Recalculate disk size on all VMs with virtual disks
     id_list = VirtualDisk.objects.values_list('virtual_machine_id').distinct()
-    VirtualMachine = apps.get_model('virtualization', 'VirtualMachine')
-    vms = VirtualMachine.objects.filter(id__in=id_list)
-    for vm in vms:
+    virtual_machines = VirtualMachine.objects.filter(id__in=id_list)
+    for vm in virtual_machines:
         vm.disk = vm.virtualdisks.aggregate(Sum('size', default=0))['size__sum']
-        vm.save()
+    VirtualMachine.objects.bulk_update(virtual_machines, fields=['disk'])
 
 
 class Migration(migrations.Migration):
 
     dependencies = [
-        ('virtualization', '0040_virtualmachine_serial_number'),
+        ('virtualization', '0039_virtualmachine_serial_number'),
     ]
 
     operations = [