Ceph » rgw

I'm experimenting with "CLOUD TRANSITION" as per https://docs.ceph.com/en/latest/radosgw/cloud-transition/

After a while I got it to work. It took a while because when I enter:

radosgw-admin zonegroup placement modify --rgw-zonegroup=maxzg --placement-id=ec22 --storage-class=CLOUDY --tier-type=cloud-s3 --tier-config=access_key=1MNLI1JA9QM1X7XMGS5R
it outputs:

.....
"s3": {
"endpoint": ...
"access_key": "1",

which obviously won't work

If I do:
radosgw-admin zonegroup placement modify --rgw-zonegroup=maxzg --placement-id=ec22 --storage-class=CLOUDY --tier-type=cloud-s3 --tier-config=access_key=MNLI1JA9QM1X7XMGS5R1
it correctly shows:
"s3": {
"endpoint": ...
"access_key": "MNLI1JA9QM1X7XMGS5R1",

I had to change the access key for the transition so it does not start with a number, as the same happens with all keys that start with a number.

This is with Ceph Quincy 17.2.5