diff --git a/antarest/study/common/studystorage.py b/antarest/study/common/studystorage.py
index cdc5aa22da..85144d60af 100644
--- a/antarest/study/common/studystorage.py
+++ b/antarest/study/common/studystorage.py
@@ -272,6 +272,5 @@ def unarchive_study_output(
     ) -> bool:
         raise NotImplementedError()
 
-    @abstractmethod
     def unarchive(self, study: T) -> None:
         raise NotImplementedError()