diff --git a/models/acc_operation.py b/models/acc_operation.py
index fc6dd0eb8c4bb15d17f044c2930a86a2eee2c960..96d6986b95fbce321ec45ca714de0fa86528579f 100644
--- a/models/acc_operation.py
+++ b/models/acc_operation.py
@@ -1078,7 +1078,6 @@ class AccOperation(models.Model):
     # ------------------------------------------------------
     # Functions to manage route
     # ------------------------------------------------------
-    @api.model
     def graph_view_global(
         self,
         scale=None,