Shopper Info save error

[cazoopilot]

I am a new user to VirtueMart. Just setting up the store in an existing Joomla 3.4 system.

I want to set up the address and contact information for our store.

Under SHOP/ SHOPPER INFORMATION
I originally set this up with my personal email information. When I attempt to change it to anyone else, it says
vmError: Save failed with the following error: This email address is already registered.

And then it defaults back to my information.

What am I doing wrong?

Version VirtueMart 3.0.12
Dean Carlton