Why can't I select another meeting host in HubSpot Academy exercise?

Hi HubSpot Community,

I’m trying to complete the practical exercise on booking a meeting on behalf of a teammate using meeting rotations. The instructions ask me to select a different host, but only my own name appears in the host options.

I’ve attached screenshots of the exercise instructions and the scheduling window. How can I complete this exercise when no other host is available? Does the practice environment need an additional user or a setup change?

Thanks for your help!