diff --git a/netbox/virtualization/api/serializers_/clusters.py b/netbox/virtualization/api/serializers_/clusters.py
index 2c1237170..adc31a73c 100644
--- a/netbox/virtualization/api/serializers_/clusters.py
+++ b/netbox/virtualization/api/serializers_/clusters.py
@@ -1,8 +1,6 @@
 from django.contrib.contenttypes.models import ContentType
 from drf_spectacular.utils import extend_schema_field
 from rest_framework import serializers
-
-from dcim.api.serializers_.sites import SiteSerializer
 from netbox.api.fields import ChoiceField, ContentTypeField, RelatedObjectCountField
 from netbox.api.serializers import NetBoxModelSerializer
 from tenancy.api.serializers_.tenants import TenantSerializer
@@ -51,7 +49,6 @@ class ClusterSerializer(NetBoxModelSerializer):
     group = ClusterGroupSerializer(nested=True, required=False, allow_null=True, default=None)
     status = ChoiceField(choices=ClusterStatusChoices, required=False)
     tenant = TenantSerializer(nested=True, required=False, allow_null=True)
-    site = SiteSerializer(nested=True, required=False, allow_null=True, default=None)
     scope_type = ContentTypeField(
         queryset=ContentType.objects.filter(
             model__in=CLUSTER_SCOPE_TYPES
diff --git a/netbox/virtualization/migrations/0043_clusters_cached_relations.py b/netbox/virtualization/migrations/0043_clusters_cached_relations.py
index eed9ae5bb..cfc7bdb10 100644
--- a/netbox/virtualization/migrations/0043_clusters_cached_relations.py
+++ b/netbox/virtualization/migrations/0043_clusters_cached_relations.py
@@ -81,5 +81,15 @@ class Migration(migrations.Migration):
             model_name='cluster',
             name='site',
         ),
+        migrations.RemoveConstraint(
+            model_name='cluster',
+            name='virtualization_cluster_unique_site_name',
+        ),
+        migrations.AddConstraint(
+            model_name='cluster',
+            constraint=models.UniqueConstraint(
+                fields=('_site', 'name'), name='virtualization_cluster_unique__site_name'
+            ),
+        ),
 
     ]
diff --git a/netbox/virtualization/models/clusters.py b/netbox/virtualization/models/clusters.py
index 42a7a54cd..da4a68df5 100644
--- a/netbox/virtualization/models/clusters.py
+++ b/netbox/virtualization/models/clusters.py
@@ -148,8 +148,8 @@ class Cluster(ContactsMixin, PrimaryModel):
                 name='%(app_label)s_%(class)s_unique_group_name'
             ),
             models.UniqueConstraint(
-                fields=('site', 'name'),
-                name='%(app_label)s_%(class)s_unique_site_name'
+                fields=('_site', 'name'),
+                name='%(app_label)s_%(class)s_unique__site_name'
             ),
         )
         verbose_name = _('cluster')