How to correct an old notebook entry?!?

Hmm? It looks like notebook entries are unable to be taken back deleted or to be updated edited after they are online. Right? 

Notebook entries can be deleted, but they can't be edited once they are posted online.  You could either delete the notebook entry and replace it with the entry that you would like, or you could revise the notebook entry as a correction. Comments on notebook entries can't be edited or deleted.  I often wish that we could edit or delete our own comments that we make on other notebook entries, and also I often wish that we could delete unwanted comments which are made on our notebook entries.