Creating new App via mgmt - fails on oidc_logout

I am trying to create a new app via mgmt api /api/v2/clients
but fail with message: Please upgrade your subscription to use oidc_logout
no documentation on what i am suppose to do.
my app currently doesn’t really have a backchannel and i’ve put the field there as ‘oidc_backchannel_logout’: {‘backchannel_logout_urls’: [“”]},
‘oidc_conformant’: True,
i tried also with oidc_conformant false although or manually created apps were true.

help required.

Apparently if i omit the oidc_backchannel_logout which the docs say is mandatory i can create the app (client) …
Docs are not amazing.