diff --git a/gns3server/schemas/controller/templates/__init__.py b/gns3server/schemas/controller/templates/__init__.py
index 33741e2b..78cd9cc2 100644
--- a/gns3server/schemas/controller/templates/__init__.py
+++ b/gns3server/schemas/controller/templates/__init__.py
@@ -45,7 +45,6 @@ class TemplateBase(BaseModel):
     category: Optional[Category] = None
     default_name_format: Optional[str] = None
     symbol: Optional[str] = None
-    builtin: Optional[bool] = None
     template_type: Optional[NodeType] = None
     compute_id: Optional[str] = None
     usage: Optional[str] = ""