Welcome! This forum has a treasure trove of great info – Scouters helping Scouters! Just a heads up, though - all content, information, and opinions shared on this forum are those of the author, not the BSA.
The original request mentions a different e-mail address in Scoutbook and my.scouting.org. If there is only one Scoutbook account, this can be fixed as I described earlier. If there are multiple Scoutbook accounts will need to do something else. Once we understand the scope of the issue, we can decide how best to proceed.
I tried to change the Scoutbook email address following your steps above and put in my personal email but it says account already exists and won’t let me.
I think I do need to do something else. I don’t know if merge is the correct because I don’t see a second BSA account - just two email addresses.
I sent you a private message so we can collect the information we need to find both of your accounts in the database and clean things up for you. Click on the T in the redish circle in the upper right of your screen.