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.
I have a parent with a “Changeyouremail@scoutbook.com” address who cannot get this undone and connect to his scout. Scout MID is 135987795, parent is 13767871. It’s possible that the parent got added to Scoutbook before his MID got created on the registration side. He is able to log in at My.Scouting.
once council has right BSA# (MID) in the troop - post again and we can clean up the SB side - the father is connected to both SB Accounts for Scout - Looks like scout is new to Troop - use paper not Scoutbook till we get it fixed for you - right now advancements do NOT merge on accounts