diff --git a/app/api/partitions.py b/app/api/partitions.py
index 822fb7645f..8305c7543e 100644
--- a/app/api/partitions.py
+++ b/app/api/partitions.py
@@ -145,6 +145,7 @@ def set_etud_group(etudid: int, group_id: int):
             g.etuds.remove(etud)
     if not ok:
         group.etuds.append(etud)
+        log(f"set_etud_group({etud}, {group})")
     db.session.commit()
     return jsonify({"group_id": group_id, "etudid": etudid})