Solr 7.5 DeleteShard not working when all cores are down

[Aroop Ganguly]

Hi All

I am trying to delete a shard from a collection using the collections api for 
the same.
On the solr ui,  all the replicas are in “downed” state. 

However, when I run the delete shard command: 
/solr/admin/collections?action=DELETESHARD&collection=x&shard=shard84
I get this exception:
{
  "responseHeader":{
    "status":400,
    "QTime":14},
  "Operation deleteshard caused 
exception:":"org.apache.solr.common.SolrException:org.apache.solr.common.SolrException:
 The slice: shard35 is currently active. Only non-active (or custom-hashed) 
slices can be deleted.",
  "exception":{
    "msg":"The slice: shard35 is currently active. Only non-active (or 
custom-hashed) slices can be deleted.",
    "rspCode":400},
  "error":{
    "metadata":[
      "error-class","org.apache.solr.common.SolrException",
      "root-error-class","org.apache.solr.common.SolrException"],
    "msg":"The slice: shard84 is currently active. Only non-active (or 
custom-hashed) slices can be deleted.",
    "code":400}}


Why is this api thinking this slice is active ? When the Solr UI shows all 
replicas down ?



Thanks
Aroop