ACORN will not take any additional actions if you enrol in courses that result in a conflict (i.e., it will not drop any course activities on your behalf). It is up to you to resolve any conflicts. You can either leave the courses as they are or enrol in alternative options. 

You can try to resolve the conflict in a few different ways:

• Explore different combinations of course sections (Lectures, Tutorials and Practicals)
• See if you can take one of the courses at a later term. Try using Degree Explorer to experiment with your options.
• Select a different course if one of the conflicting courses is not required to complete your program or degree