Have you heard of the Peter principle?
In an organizational structure, assessing an employee's potential for a promotion is often based on their performance in their current job. This can eventually result in their being promoted beyond their highest level of competence and potentially then to a role in which they are not competent, referred to as their "level of incompetence"
I want to know is there a word for the "act of occupying a position that you are incompetent in"?