There is already a domain connection enabled for strategy auth0

We gave two domain-level connections with strategy == ‘auth0’, and the second that is created gives us this error.

Error: 409 Conflict: There is already a domain connection enabled for strategy auth0
on subtenant-members-idp.tf line 9, in resource “auth0_connection” “”:
9

Is there another strategy we should use? Where are strategies documented?