Revert Clusters in Mongosync

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1

I configured mongosync for two self-managed replications. Synchronization runs well. I have troubles in reversing with

"mongosync" user. 
source cluster: 
user: 'mongosync',
    db: 'admin',
    roles: [
      { role: 'restore', db: 'admin' },
      { role: 'backup', db: 'admin' },
      { role: 'clusterManager', db: 'admin' },
      { role: 'clusterMonitor', db: 'admin' },
      { role: 'readWriteAnyDatabase', db: 'admin' }
Destination cluster:
user: 'mongosync',
    db: 'admin',
    roles: [
      { role: 'restore', db: 'admin' },
      { role: 'backup', db: 'admin' },
      { role: 'clusterManager', db: 'admin' },
      { role: 'clusterMonitor', db: 'admin' },
      { role: 'dbAdmin', db: 'admin' },
      { role: 'readWriteAnyDatabase', db: 'admin' }


[root@mongo2 ~]# curl localhost:27182/api/v1/reverse -XPOST --data '{ }' | jq
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   610  100   607  100     3    728      3  0:00:01 --:--:--  0:00:01   732
{
  "success": false,
  "error": "APIError",
  "errorDescription": "error dropping database mongosync_reserved_for_internal_use: failed to execute a command on the MongoDB execute command { dropDatabase: 1, writeConcern: { w: \"majority\", j: true, wtimeout: 120000 }, lsid: { id: UUID(\"d835e7cb-912, 4), signature: { hash: BinData(0, 564DAF0075DD6B46B7D6B38834483B3FA00D5B04), keyId: 7404745595098759175 } }, $db: \"mongo
}

I also tested reversing with root-role users. It’s ok.
I would like to grant minimum privileges. Everyone helps me. Thanks alot.