Fix SchoolTermCreateMutation

aleksis/core/schema/school_term.py

@@ -39,6 +39,7 @@ class SchoolTermCreateMutation(DjangoCreateMutation):
     class Meta:
         model = SchoolTerm
         permissions = ("core.create_school_term",)  # FIXME
+        exclude = ("managed_by_app_label",)
 
     @classmethod
     def validate(cls, root, info, input):  # noqa