Hello! We are attempting to use role redelegation with Heat and Keystone to deploy a stack that deploys Zaqar subscriptions among other resources. When attempting to scale up the stack, we receive this error: TypeError: '<' not supported between instances of 'NoneType' and 'int') This appears to be sourced from this check in the code in the Keystone core.py file. # expiry times trust_expiry = trust.get('expires_at') redelegated_expiry = redelegated_trust['expires_at'] if trust_expiry: # redelegated trust is from backend and has no tzinfo if redelegated_expiry < trust_expiry.replace(tzinfo=None): raise exception.Forbidden( _('Requested expiration time is more ' 'than redelegated trust can provide')) The issue appears to be related to 'None' values for what is passed into 'expires_at' for 'redelegated_expiry'. We have this config in keystone.conf: [trust] allow_redelegation = True And this in heat.conf: reauthentication_auth_method = trusts allow_trusts_redelegation = True This is how we are scaling the stack: openstack stack resource signal <stack_name> scale_up_policy Any suggestions on how to fix this issue? Thanks, Devin