The benchmark assessment is intended to customize the content of step 2 based on your previous knowledge. Consequently, it will be understood that you do not need to do this assessment if you access the content of step 2 first.
Also, please note that there is only one opportunity to do this benchmark assessment. Make sure you have completed the activity before clicking finish test. If you quit the assessment before completing it you will not be allowed to take it again and it will be marked as completed in the main menu.