Problem in activate Jira Service Desk account

[enrique carranza]

When I want to activate a Jira Service Desk account I get the message "It is not possible to activate the user because the email address is already associated with an Atlassian account."

How can I disassociate the mail with the Atlassian account?

Thanks in advance.

[Jack Brickey]

My question is why would the email be reused? If that is required I believe you would have to delete the previous completely. Generally this is a bad idea as it  messes with any issues that involved the user (Assignee, reporter, mentions,etc)