Unit-name in config-flags option

Hi all,
i would like to enable rgw swift versioning in my ceph-radosgw unit.
There is no specific config option for versioning, so i think i have to use the config-flags “alternative” way.

Sadly, the config option is under the [client.rgw.“unit-name”] section, so my question is:
how can i run the config?
I tried for example

‘{’‘client.rgw.*’’: {’‘rgw swift versioning enabled’’: ‘‘true’’}}’

But nothing.
Any idea?