diff --git a/antarest/study/storage/variantstudy/model/command/icommand.py b/antarest/study/storage/variantstudy/model/command/icommand.py
index 72eb6bfa02..1c5c704320 100644
--- a/antarest/study/storage/variantstudy/model/command/icommand.py
+++ b/antarest/study/storage/variantstudy/model/command/icommand.py
@@ -19,7 +19,7 @@
 logger = logging.getLogger(__name__)
 
 
-class ICommand(ABC, BaseModel, extra=Extra.forbid, arbitrary_types_allowed=True):
+class ICommand(ABC, BaseModel, extra=Extra.forbid, arbitrary_types_allowed=True, copy_on_model_validation="deep"):
     """
     Interface for all commands that can be applied to a study.