As part of upgrading a server from PostgreSQL 9.5 -> 11 using pg_dumpall | psql, I had to configure a new barman backup server to replace the old barman backup server. I now have two barman servers configured: xyz-pgsql-dev1 (active = false) and xyz-pgsql-dev1@11. I would like to gradually cleanup the backups for the old server to make space for the new backups, but I am unable to use the barman command to do this:

$ sudo barman list-server
xyz-pgsql-dev1 - xyz-pgsql-dev1 @ PostgreSQL 9.5 (inactive)
xyz-pgsql-dev1@11 - xyz-pgsql-dev1 @ PostgreSQL 11
$ sudo barman list-backup xyz-pgsql-dev1
Skipping inactive server 'xyz-pgsql-dev1'
$ sudo barman delete xyz-pgsql-dev1 20190521T031702
Skipping inactive server 'xyz-pgsql-dev1'

Would it be possible to allow such maintenance commands for inactive servers, when using active = false to decomission a server?