API token expiry

We have been using Circle CI Api token to publish custom orbs succesfully for a while now. Suddenly, everything stopped working. After some investigation it appeared to have stopped working 1 year after the Api token was created.

As we can’t find any documentation around the expiry of the Api tokens generated by a Circle CI Organization owner, we are looking to verify if it is expected to expire after 1year? If so, would there be any documentation to refer to that we have been missing other than Managing API Tokens - CircleCI?

Thanks