User with the same e-mail address already exists

Issue

When trying to add a new user account, the error message:
{"Message":"- A user with the same e-mail address already exists.\r\n"}
Even when the e-mail address is not currently in use by any of the accounts.

During the deletion of the account, a task hasn't been executed correctly, causing the above error. Follow the steps below to resolve this issue.

Resolution

• Go to command.robinhq.com
• Select the correct environment
• Go to 'Subscription Management' > 'User Management'
• Press CTRL + F
• Search for the e-mail address used to add the account
• Set the deleted account to 'regular'/'collaboration'
• The user account is now available through the settings.