Tried in the social contextual menu and also by right clicking the portrait/party/focus.
No idea why the name would be a problem, i had no -1 on it. I had other toons with the same name-2/-3 and renamed them in hope to fix my issue. No luck :(
The error message at first glance is really strange and inappropriate. Like if data were altered.
If you had used the command-line to change the name, but I understood that you didn't,
I'm wondering if the transfer tool is triggering non-required name change with non-alphabetic characters appended to the name.
I just saw a toon in the harbor on Moonsea with a name ending with '-' and no number.
In the default code page
ANSII , one of the first characters simulates a backspace, per example, once thrown into a terminal.
With any random character + a 'backspace' added to your name in octal or hex format , you would not see the difference once displayed/printed/written.
EDIT : or 'null' char , x00 kinda common value as filler in raw data chunk, if 1 char-equivalent is added to the name .