Scouter unable to add member id in MY. Scouting

HI, We have a scouter MID 14028407 who would like to add his original MID 3706546 ( out of council) to his profile. He is receiving the error: The Provided Member Id does not match the existing user profile.
Would it be possible for you to add the member id or offer guidance? Thanks for any assistance.

@ChristaLawrence

I sent you a private message so I can get more information. Click on the pink circle with white C in the upper right of your forum window.