Snapshot does not exist during migration

[iceman (ori)]

hi all,
I want to migrate all the data from one k8s cluster to another , ES ver 7.10.1.
So first I created successful snapshot on the first cluster:

[elasticsearch@es backup]$ curl -X PUT "localhost:9200/_snapshot/backup/snapshot_001?wait_for_completion=true&pretty"
{
  "snapshot" : {
    "snapshot" : "snapshot_001",
    "uuid" : "5h_bBA14ST2R2wrFYs8T6Q",
    "version_id" : 7100199,
    "version" : "7.10.1",
    "indices" : [
      "vabtaao5aeataraqqjar2s2aktae2aqaa__--",

Then copied the whole snapshot backup folder to the destination ES (same version), in the folder of restoring . Afterwards I tried to restore :

 curl -X POST "http://localhost:9200/_snapshot/backup/snapshot_001/_restore?pretty"
{
  "error" : {
    "root_cause" : [
      {
        "type" : "snapshot_restore_exception",
        "reason" : "[backup:snapshot_001] snapshot does not exist"
      }
    ],
    "type" : "snapshot_restore_exception",
    "reason" : "[backup:snapshot_001] snapshot does not exist"
  },
  "status" : 500
}

How on the destination ES cluster can I make this restore ?
Thanks in advice