unable to change email, it is already associated with another Atlassian account

[Andreas Bosch]

User had two accounts, accounts using old and new email was a duplicate for user.  

Deleted, newly created duplicate account.

But, now not able to change email address on original profile, getting error stating email "is already associated with another Atlassian account."  

[Angélica Luz]

Hi Andreas,

Thank you for reaching out to Atlassian Community!
When we delete an Atlassian account, it takes 14 days to completely delete the account and then you can use this account again for another Atlassian account.
To do not wait this 14 days, there is a workaround that "free" the account on the same day.
Please ask the user to follow the steps below and let me know if they face any issue.

Steps:

1 - Create a test email that you will use only once, for example, test.temp@domain.com. This email must not have an Atlassian account, that's why it's important if it's a brand new email, you can create on Gmail, outlook, yahoo.
2 - Go to id.atlassian.com/manage-profile/email. Remember that you need to log in using the NEW account, the one that you need to free to be used.
3 - After logging in with the desired account, change the email to test.temp@domain.com.
4 - Go to test.temp@domain.com inbox and confirm the change.
5 - The email you need is now free to be used since is not linked to an Atlassian account.
6 - Now, go to id.atlassian.com/manage-profile/email logged with the OLD email and change it to the new email.
7 - Go to the email to confirm the change.

Regards,
Angélica