diff --git a/gns3server/schemas/controller/links.py b/gns3server/schemas/controller/links.py
index 6078db5f6..a1b741440 100644
--- a/gns3server/schemas/controller/links.py
+++ b/gns3server/schemas/controller/links.py
@@ -18,7 +18,7 @@ from enum import Enum
 from typing import Annotated, List, Literal, Optional, Tuple
 from uuid import UUID, uuid4
 
-from pydantic import BaseModel, ConfigDict, Field, field_validator
+from pydantic import BaseModel, ConfigDict, Field, field_validator, model_validator
 
 from ..update import PartialUpdateModel
 from .labels import Label