[Boost-users] [multi_index] function to force to recreate indexes?

I have two multi_index_containers with smart pointers which refer to the same objects (at least some of the pointers refer to the objects). When I access and modify an object via an index of one of the two multi_index_containers the indexes of that container are recreated as far as I understand. But how do I make the other multi_index_container recreate its indexes? I can't and don't need to modify the object again. Is there anything to force a multi_index_container to recreate its indexes? Boris