diff --git a/advlabdb/adminModelViews.py b/advlabdb/adminModelViews.py
index 5bc4cba..3f3d11a 100644
--- a/advlabdb/adminModelViews.py
+++ b/advlabdb/adminModelViews.py
@@ -148,8 +148,7 @@ class UserView(SecureAdminModelView):
         active_semester = QuerySelectField(
             "Active Semester",
             query_factory=semesterQueryFactory,
-            allow_blank=True,
-            blank_text="-",
+            validators=[DataRequired()],
             default=lastSemester,
             description="Not fixed and users (including assistants) can change it.",
         )
diff --git a/advlabdb/scripts/setup/init_database.py b/advlabdb/scripts/setup/init_database.py
index 5319cc0..adbf1ed 100644
--- a/advlabdb/scripts/setup/init_database.py
+++ b/advlabdb/scripts/setup/init_database.py
@@ -69,6 +69,7 @@ def main():
                 mobile_phone_number=admin_mobile_phone_number.strip() or None,
                 building=admin_building.strip() or None,
                 room=admin_room.strip() or None,
+                active_semester=semester,
             )
 
             admin = Admin(user=admin_user)
diff --git a/advlabdb/scripts/test/test_database.py b/advlabdb/scripts/test/test_database.py
index 184e59c..f5eb754 100644
--- a/advlabdb/scripts/test/test_database.py
+++ b/advlabdb/scripts/test/test_database.py
@@ -107,6 +107,7 @@ def main():
                 roles=[adminRole],
                 first_name="Peter",
                 last_name="Blümler",
+                active_semester=sem2,
             )
 
             admin = Admin(user=admin_user)
@@ -121,6 +122,7 @@ def main():
                 last_name="l",
                 phone_number="012333212",
                 mobile_phone_number="012334123",
+                active_semester=sem2,
             )
             us2 = user_datastore.create_user(
                 email="test2@protonmail.com",
@@ -128,6 +130,7 @@ def main():
                 roles=[assistantRole],
                 first_name="As2",
                 last_name="l",
+                active_semester=sem2,
             )
 
             as1 = Assistant(user=us1)