[ERROR] Can't start cross cluster replication

Plugins Cross-Cluster Replication
8

Yes it doesn’t replicate new data to replicated cluster.
My example:
Create test_ccr index in main cluster.
Start in replicate cluster like:

PUT _opendistro/_replication/test_ccr/_start?pretty
{
  "remote_cluster": "leader-cluster",
  "remote_index": "test_ccr"
}

It does replicates all document from main cluster. But when i keep insert more document, in replicate cluster doesn’t change.

I tried to stop and start again but it says

{
  "error" : {
    "root_cause" : [
      {
        "type" : "illegal_argument_exception",
        "reason" : "Cant use same index again for replication. Either close or delete the index:test_ccr"
      }
    ],
    "type" : "illegal_argument_exception",
    "reason" : "Cant use same index again for replication. Either close or delete the index:test_ccr"
  },
  "status" : 400
}