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aleksis/apps/chronos/util/predicates.py

@@ -15,7 +15,7 @@ def has_timetable_perm(user: User, obj: Model) -> bool:
         return (
             obj in user.person.member_of.all()
             or user.person.primary_group == obj
-            or user.person.owner_of.filter(id=obj.id).exists()
+            or obj in user.person.owner_of.all()
             or has_global_perm("chronos.view_all_group_timetables")(user)
             or has_object_perm("core.view_group_timetable")(user, obj)
         )