Problems Sharing NoteBloc

[mnbvmnbv]

Hi everyone,

I'm in a multiserver environment and I have users create before a some date (old users)
I have somes users create after a this date (new users)

If some old user shared their notebloc they can see the notebloc but the cant access to this notebloc. But if some old user share their notebloc with new users, the new users can see and editing the document that there are in the note bloc.

I don't what is the problem, but when the old users try to share the notebloc with others old users, this problem happend:

HTTP ERROR 500

Problem accessing /service/home/testtes@domain.es/testest2's Bloc de notas. Reason:

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