u/TechnologyWest5041

Theory: The person who initially assigned the labs may have used room numbers 1, 2, and 3, and later changed them to 5041, 5241, and 5242 respectively. They may have manually updated the first two, but when they reached 5242, they might have replaced all “3”s with 5242, causing the error. So, to recover your original room number, simply replace “5242” with “3”.