diff --git a/antarest/study/storage/utils.py b/antarest/study/storage/utils.py
index a0fc7a02fe..8e9a9a573d 100644
--- a/antarest/study/storage/utils.py
+++ b/antarest/study/storage/utils.py
@@ -52,7 +52,7 @@ def update_antares_info(metadata: Study, study_tree: FileStudyTree, *, update_au
     study_data_info["antares"]["created"] = metadata.created_at.timestamp()
     study_data_info["antares"]["lastsave"] = metadata.updated_at.timestamp()
     study_data_info["antares"]["version"] = metadata.version
-    if update_author:
+    if update_author and metadata.additional_data:
         study_data_info["antares"]["author"] = metadata.additional_data.author
     study_tree.save(study_data_info, ["study"])
 
diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index 23e2342ce4..690de1a7eb 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -17,6 +17,7 @@ v2.16.5 (2024-02-29)
 * **ui-results:** prevent duplicate updates on same toggle button click [`#1945`](https://github.com/AntaresSimulatorTeam/AntaREST/pull/1945)
 * **ui-thermal:** update cluster group options to handle `Other 1` [`#1945`](https://github.com/AntaresSimulatorTeam/AntaREST/pull/1945)
 * **variants:** correct the generation of variant when a snapshot is removed [`#1947`](https://github.com/AntaresSimulatorTeam/AntaREST/pull/1947)
+* **study:** correct access to study `additional_data` [`#1949`](https://github.com/AntaresSimulatorTeam/AntaREST/pull/1949)
 
 
 v2.16.4 (2024-02-14)