Cheat Codes for Tribes of the East.

Dear experts! I really need your help. I'm currently playing the "Throne of the King" add-on for Heroes 5. At some point, I added a skill to a hero using the command `add_skill 142` in the console. The "LUCKY WIZARD" skill appeared. Now I need to remove this skill, and I tried to use the command `unlearn_skill 142`, but it doesn't work. The console displays an error in red and shows this:
      Unknown command name "unlearn_skill 142"
      Type "help" to list available commands.
I enter "help", and it displays something completely incomprehensible. I'm a novice in this, but maybe someone can help me figure out this problem? How can I remove an unnecessary skill or ability without a mentor? Thank you in advance.