During the CSSA training, excercise rule resolution (10) is asking you to create a copy of a section and then withdraw that section, see below:
However if I follow the steps as told, I get the problem that the rules are not withdrawn at all. After long investigation and multiple resets of my virtual machine, I have found that steps 3 - 5 are not complete. If you do exactly as described, the rules are being registered as "checked out" and therefore I get problems with saving and deleting the rules to fix the problem.
Solution: You have to check-in the rules which you want to withdraw, otherwise the excercise system keeps creating issues with this excercise.
Please update the excercise material to provide this information. As an inexperienced trainee, this is very complex to identify the issue.