Meaning of warning "Bucket is not on any other peer! Removing it."

Hello there, We faced an issue with our Indexer Cluster and I am trying to understand what happened. I see these messages : 07-25-2018 11:51:02.387 +0200 WARN CMMaster - event=removePeerBuckets peer= peer_name= bid= msg="Bucket is not on any other peer! Removing it." 07-25-2018 19:51:02.387 +0200 WARN CMMaster - event=removePeerBuckets peer= peer_name= bid= msg="Bucket is not on any other peer! Removing it." It seems to be saying that the bucket has been removed but I am still able to retrieve data from that particular bucket via a Splunk search and I can also spot both db and rb buckets on those idx1& idx4 cold DBs. Any idea ? Thanks in advance,