[ceph-users] RGW objects has same marker and bucket id in different buckets.

Hello. I have a rgw s3 user and the user have 2 bucket. I tried to copy objects from old.bucket to new.bucket with rclone. (in the rgw client server) After I checked the object with "radosgw-admin --bucket=new.bucket object stat $i" and I saw old.bucket id and marker id also old bucket name in the object stats. Is rgw doing this for deduplication or is it a bug? If it's not a bug then If I delete the old bucket what will happen to these objects???