Unable to activate Remote Admin subscription

I am unable to enable a Remote Admin subscription.

From the "Registered Hubs" page of my.hubitat.com I choose "Add Remote Admin" on either of my two hubs. That takes me to a https://shop-prod.hubitat.com page where I have chosen "Yearly" then clicked the "Sign up now" button. A red banner appears near the top of the page that says "You cannot add a subscription for a different user."

Not sure what that message is supposed to indicate. Regardless, I am unable to complete the trial or purchase of Remote Admin.

Any help appreciated.

Thanks much

Tagging the Remote Admin guru @bobbyD

This message appears when the hub already has an active subscription linked to another account. If you changed the admin account or purchased a used hub, the previous admin must cancel the existing subscription before you can enroll the hub.

If you believe you received this message in error, please submit a support case here: Subscriptions – Hubitat Support

I am the original owner of both Hubs. I will open a support case.

Thanks much