Problem:

If you see the error "We encountered a problem - Error adding identity ... The identity provided by your VCS service is already associated with a different account. Please try logging in using that account or contact us for further help.", this means that the VCS account you are trying to connect has previously been authorized with CircleCI.

Solutions:

• Please try disconnecting your VCS account on the user settings page.
• If you are still unable to connect your VCS account, please raise a ticket with our Support team and we will manually disconnect your VCS account for you.

PLEASE NOTE: Disconnecting a user might clear any user keys that have been generated for any of your projects with this user, so you will potentially need to regenerate these once the user is reconnected.

Outcome:

If your user was previously connected to another CircleCI account, manually disconnecting it will enable you to connect it to your other CircleCI account.

Additional Resources:

How to Manage Your VCS Connections with CircleCI and delete your user identity

How to Perform a Re-Authentication