Prefix for DB gone

Today I want to add a DB-User and DB.
Since today the username was created with a prefix like c12_myChoosenName.
But since today the Prefix is gone, and I don't know why.

On System ⇒ Settings ⇒ Site ⇒ DB Userprefix the Textfields where empty.
I try something like: c[client_id]_ or [SERVERNAME], but they wont be replaced if I create a new DB-User.
Any hint, why this not work... and which Placeholder to use here?

ISPConfig Version: 3.0.5.4p8

 

use [CLIENTID] it's not CLIENT_ID nor client_id - it's also case sensitive.

 

Great. this work... Is there an overwiew for all placeholders and where to use them?

 

Not sure, maybe in the source code or in the documentation .pdf
A quick grep at the sources revealed 'CLIENTNAME', 'CLIENTID', 'DOMAINID' to me for use on website entries. Can be different for other options, haven't peaked much into the code.