9.2.5 Apprentice
One option for learning a new profession is to become an apprentice to another character, in that profession. In order to become an apprentice, you must find another player who is a master of that profession.
If you decide to become an apprentice to another player, you will automatically switch from the profession you are currently using, but you will still retain your existing profession and can switch back to it at any time.
See also: HELP PROFESSION, HELP PROFESSION RANKS, HELP MASTER