I've already ask three or four administrator and moderator about that: My former characters is dead (Jon Jovem), now his brother (Angus Jovem, my new character) have found his journal and started to write on it. I'd like to ask that you change the topic title from:

The Marvelous Life of Jon Jovem (Journal)

to

The former Jon Jovem Journal

Can you do that please?

best regards

you can do it since you are the creator of the topic, just edit the first post, and change the subject 8)

This is the wrong forum to make requests of this kind.

The right forum would be to send an e-mail to the DM e-mail account making the request, or catch a DM with time on IRC.

Moderators are just other players with no special power beyond the particular faction they moderate (typically a PC faction).

As has been pointed out, you should be able to do it yourself.