diff --git a/aleksis/apps/untis/util/mysql/importers/common_data.py b/aleksis/apps/untis/util/mysql/importers/common_data.py
index 9d788ef30e70cb6b5d8e03b5ba0626c526ed63a6..a2f82a9fef04f9f4d8e2f9403fdfa85e90a2fd50 100644
--- a/aleksis/apps/untis/util/mysql/importers/common_data.py
+++ b/aleksis/apps/untis/util/mysql/importers/common_data.py
@@ -376,7 +376,7 @@ def import_supervision_areas(
                 new_supervision, created = new_area.supervisions.get_or_create(
                     validity=validity_range,
                     break_item=breaks_ref[weekday][period_after_break],
-                    defaults={"teacher": teacher},
+                    teacher=teacher,
                 )
 
                 # Log