ERROR invalid value "json" for option --format: unknown format "json" with Juju 2.9.50

[marino-mrc]

Hello,
I'm trying to deploy a simple stack and I get the following error:

$ ./generate-bundle.sh --series focal --release ussuri --ceph --ml2-ovs --name openstack-test 
Creating Juju model openstack-test
Added 'openstack-test' model on prodstack/prodstack6 with credential 'stg-reproducer-marino-mrc_project' for user 'admin'

ERROR invalid value "json" for option --format: unknown format "json"
ERROR invalid value "json" for option --format: unknown format "json"
Created focal-ussuri bundle and overlays:
  + openstack/glance.yaml
  + openstack/keystone.yaml
  + openstack/neutron-gateway.yaml
  + openstack/neutron-openvswitch.yaml
  + openstack/rabbitmq-source.yaml
  + ceph/ceph.yaml
  + openstack/openstack-ceph.yaml
  + ceph/ceph-juju-storage.yaml
  + openstack/neutron-ml2dns.yaml
  + openstack/neutron-ml2dns-gateway.yaml
  + openstack/neutron-ml2dns-openvswitch.yaml
  + mysql-innodb-cluster.yaml
  + mysql-innodb-cluster-router.yaml
  + openstack/placement.yaml

Command to deploy:
juju deploy     /home/ubuntu/stsstack-bundles/openstack/b/openstack-test/openstack.yaml --overlay /home/ubuntu/stsstack-bundles/openstack/b/openstack-test/o/openstack/glance.yaml --overlay /home/ubuntu/stsstack-bundles/openstack/b/openstack-test/o/openstack/keystone.yaml --overlay /home/ubuntu/stsstack-bundles/openstack/b/openstack-test/o/openstack/neutron-gateway.yaml --overlay /home/ubuntu/stsstack-bundles/openstack/b/openstack-test/o/openstack/neutron-openvswitch.yaml --overlay /home/ubuntu/stsstack-bundles/openstack/b/openstack-test/o/openstack/rabbitmq-source.yaml --overlay /home/ubuntu/stsstack-bundles/openstack/b/openstack-test/o/ceph/ceph.yaml --overlay /home/ubuntu/stsstack-bundles/openstack/b/openstack-test/o/openstack/openstack-ceph.yaml --overlay /home/ubuntu/stsstack-bundles/openstack/b/openstack-test/o/ceph/ceph-juju-storage.yaml --overlay /home/ubuntu/stsstack-bundles/openstack/b/openstack-test/o/openstack/neutron-ml2dns.yaml --overlay /home/ubuntu/stsstack-bundles/openstack/b/openstack-test/o/openstack/neutron-ml2dns-gateway.yaml --overlay /home/ubuntu/stsstack-bundles/openstack/b/openstack-test/o/openstack/neutron-ml2dns-openvswitch.yaml --overlay /home/ubuntu/stsstack-bundles/openstack/b/openstack-test/o/mysql-innodb-cluster.yaml --overlay /home/ubuntu/stsstack-bundles/openstack/b/openstack-test/o/mysql-innodb-cluster-router.yaml --overlay /home/ubuntu/stsstack-bundles/openstack/b/openstack-test/o/openstack/placement.yaml 
 

Post-Deployment Info/Actions:

[common]
  - run ./configure to initialise your deployment
  - source novarc
  - add rules to default security group: ./tools/sec_groups.sh`

I think the problem here is Juju at version 2.9.50

Regards,
Marco