diff --git a/services/backend/apps/core/admin.py b/services/backend/apps/core/admin.py
index 8a7dbe4..3bc8edf 100644
--- a/services/backend/apps/core/admin.py
+++ b/services/backend/apps/core/admin.py
@@ -2,4 +2,3 @@ from django.contrib import admin
 from django.contrib.auth.models import Group, User
 
 admin.site.unregister(Group)
-admin.site.unregister(User)
diff --git a/services/backend/apps/review/models.py b/services/backend/apps/review/models.py
index 9b99285..9dd8d7f 100644
--- a/services/backend/apps/review/models.py
+++ b/services/backend/apps/review/models.py
@@ -44,7 +44,7 @@ class Review(BaseModel):
     )
 
     def __str__(self):
-        return self.id
+        return str(self.id)
 
     class Meta:
         verbose_name = "проверка"