diff --git a/common/ASC.Core.Common/Data/DbTenantService.cs b/common/ASC.Core.Common/Data/DbTenantService.cs
index 59b26e36c8e..d703aa1ffb5 100644
--- a/common/ASC.Core.Common/Data/DbTenantService.cs
+++ b/common/ASC.Core.Common/Data/DbTenantService.cs
@@ -231,9 +231,8 @@ IQueryable<TenantUserSecurity> query() => TenantsQuery()
 
                 //new password
                 result = result.Concat(q.Select(FromTenantUserToTenant)).ToList();
-                result.Distinct();
 
-                return result;
+                return result.Distinct();
             }
         }