Samsung Health different account names

[Android Central Question]

I have a galaxy s5 phone with my account name. I got a J7V recently and it was set up with a different email. I tried to sync my sHealth data but cant because they are 2 different account names. When I went to my J7V to change my acct. name to the other devices acct. name it said email already in use. How do I get around this in order to get data from old phone to new phone