Do you mean you’re going to repeat SSB Low Volume I, or do you mean move onto SSB Low Volume II? You should definitely do II, rather than repeat I and go onto Build.
Every training block has a recovery week in the last week which dials back intensity and TSS. For most people, this is enough to let the body absorb the training from the block. So, the plan design is to move from one training block to the next back-to-back, BUT if at the end of the recovery week you’re still feeling fatigued and are not excited about getting on some tough intervals, maybe repeat the recovery week or give yourself a couple of days off the bike, or both.
Dig deep! If you haven’t seen this thread yet, I recommend having a read through before your Ramp Test to make the most of it. The Ramp Test protocol doesn’t require any pacing strategies like the longer formats do, but there is still some skill involved in making the most of your results.