Two Turnitin IDs for one user

A student was getting this error message when she tried to submit her assignment to the Turnitin Activity on the CCLE class site:

“Uploading user information failed because user email was changed to an address that is already associated with an account. UID: *********- Old Email” *****@ucla.edu – New-Email" *****@g.ucla.edu."

Note that the upload will fail for both the student and the instructor as both face same issue.