I agree with @Stephen_Hornak about verifying that all of the relevant advancement is currently reflected in the Scoutbook database. I also would add that, you won’t be able to actually verify that easily without assigning the scouts to their dens in Scoutbook, which as was pointed out is not automatic.
I can see some advantages to an “overlap” while getting familiar with the Scoutbook platform. At the same time, there’s potential for a lot of overlap, both in terms of duplicated work processes as @DonovanMcNeil noted, and potentially duplicate notices as events are added/moved to the Scoutbook calendars. I’d make sure your parents and leaders are informed that you’re transitioning and warned that it’s going to have some hiccups. The parents are often one of the best sources of feedback on (and people most impacted by) how things are going. So, actively engaging them on the front end can help with getting that feedback as helpful suggestions rather than upset emails. :^)
There are some very good how-to articles available for Scoutbook. I linked to several of them in a post here: Caution ⚠️ tags on everyone - #15 by CharleyHamilton
