[ceph-users] RGW - user created bucket with name of already created bucket

Hello, I would like to share a quite worrying experience I’ve just found on one of my production clusters. User successfully created a bucket with name of a bucket that already exists! He is not bucket owner - the original user is, but he is able to see it when he does ListBuckets over s3 api. (Both accounts are able to do it now - only the original owner is able to interact with it) This bucket is also counted to the new users usage stats. Has anyone noticed this before? This cluster is running on Quincy - 17.2.6. Is there a way to detach the bucket from the new owner so he doesn’t have a bucket that doesn’t belong to him? Regards, Ondrej