I have a contact in Hub under Events, where he registered using one email.  Then I imported his full contact info into the LP Pipeline -- via the Hub LinkedIn Chrome extension - which has a different email.  I now want to edit his email in Hub, to make it the same as his Events email.  But Hub won't let me, saying that email is already used.  So my only choice is to delete the full record imported from LinkedIn -- but that's stupid and wasteful, because I do want to keep the rest of his info I imported.