I have found when moving a relationship to its own constituent that not all the data is transferred over. When speaking with support they had said this is how the function works which to me does not make sense. You would think that once you make a record its own from a relationship it would transfer everything over, I would like to recommend fixing this function to transfer all data over when making a relationship a constituent. That way we are not going into every record individually to add information we have already added in before.