diff --git a/docs/release-notes/version-2.7.md b/docs/release-notes/version-2.7.md
index 68487ebb8..9fc1c1c91 100644
--- a/docs/release-notes/version-2.7.md
+++ b/docs/release-notes/version-2.7.md
@@ -4,6 +4,7 @@
 
 * [#4043](https://github.com/netbox-community/netbox/issues/4043) - Fix toggling of required fields in custom scripts
 * [#4049](https://github.com/netbox-community/netbox/issues/4049) - Restore missing `tags` field in IPAM service serializer
+* [#4056](https://github.com/netbox-community/netbox/issues/4056) - Repair schema migration for Rack.outer_unit (from #3569)
 
 ---
 
diff --git a/netbox/dcim/migrations/0079_3569_rack_fields.py b/netbox/dcim/migrations/0079_3569_rack_fields.py
index 4e76a270f..da544bb7a 100644
--- a/netbox/dcim/migrations/0079_3569_rack_fields.py
+++ b/netbox/dcim/migrations/0079_3569_rack_fields.py
@@ -37,7 +37,7 @@ def rack_status_to_slug(apps, schema_editor):
 def rack_outer_unit_to_slug(apps, schema_editor):
     Rack = apps.get_model('dcim', 'Rack')
     for id, slug in RACK_DIMENSION_CHOICES:
-        Rack.objects.filter(status=str(id)).update(status=slug)
+        Rack.objects.filter(outer_unit=str(id)).update(outer_unit=slug)
 
 
 class Migration(migrations.Migration):
diff --git a/netbox/dcim/migrations/0092_fix_rack_outer_unit.py b/netbox/dcim/migrations/0092_fix_rack_outer_unit.py
new file mode 100644
index 000000000..2a8cbf4e5
--- /dev/null
+++ b/netbox/dcim/migrations/0092_fix_rack_outer_unit.py
@@ -0,0 +1,27 @@
+from django.db import migrations
+
+RACK_DIMENSION_CHOICES = (
+    (1000, 'mm'),
+    (2000, 'in'),
+)
+
+
+def rack_outer_unit_to_slug(apps, schema_editor):
+    Rack = apps.get_model('dcim', 'Rack')
+    for id, slug in RACK_DIMENSION_CHOICES:
+        Rack.objects.filter(outer_unit=str(id)).update(outer_unit=slug)
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('dcim', '0091_interface_type_other'),
+    ]
+
+    operations = [
+        # Fixes a missed field migration from #3569; see bug #4056. The original migration has also been fixed,
+        # so this can be omitted when squashing in the future.
+        migrations.RunPython(
+            code=rack_outer_unit_to_slug
+        ),
+    ]