Google Cloud-Compute Engine，使用实例模板插入实例

我想通过Java google-api-client使用InstanceTemplate创建一个实例。执行完该操作后，新实例将在GCP的Compute Engine前端中显示，即创建beein。10-15秒后，实例消失。

按照参考手册，我无法理解为什么我的代码无法正常工作。
https://cloud.google.com/compute/docs/reference/rest/v1/instances/insert

Compute.Instances.Insert insert = compute
                    .instances()
                    .insert("{{project-id}}","europe-west1-c",instance)
                    .setSourceInstanceTemplate("/compute/v1/projects/{{project-id}}/global/instanceTemplates/instance-template-1")
                    .setZone("europe-west1-c")
                    .setProject("{{project-id}}");
            Operation op = insert.execute();

实例对象如下所示：

Instance instance = new Instance();
instance.setName(instanceName);
instance.setMachineType("zones/europe-west1-c/machineTypes/g1-small");

Gradle依赖

compile 'com.google.api-client:google-api-client:1.31.2'  
compile group: 'com.google.apis', name: 'google-api-services-compute', version: 'v1-rev235-1.25.0'

来自GCP的日志：

{
  "protoPayload": {
    "@type": "type.googleapis.com/google.cloud.audit.AuditLog",
    "status": {
      "code": 3,
      "message": "INVALID_PARAMETER"
    },
    "authenticationInfo": {
      "principalEmail": "compute-dev-me@{{project-id}}.iam.gserviceaccount.com"
    },
    "requestMetadata": {
      "callerIp": "12.34.56.78",
      "callerSuppliedUserAgent": "redacted/0.1 Google-API-Java-Client/1.31.2 Google-HTTP-Java-Client/1.37.0 (gzip),gzip(gfe)"
    },
    "serviceName": "compute.googleapis.com",
    "methodName": "v1.compute.instances.insert",
    "resourceName": "projects/{{project-id}}/zones/europe-west1-c/instances/test-mit-richtig",
    "request": {
      "@type": "type.googleapis.com/compute.instances.insert"
    }
  },
  "insertId": "-duwg4fde7a2",
  "resource": {
    "type": "gce_instance",
    "labels": {
      "instance_id": "redacted-number",
      "zone": "europe-west1-c",
      "project_id": "{{project-id}}"
    }
  },
  "timestamp": "2021-02-xxTxx:xx:xx.565227Z",
  "severity": "ERROR",
  "logName": "projects/{{project-id}}/logs/cloudaudit.googleapis.com%2Factivity",
  "operation": {
    "id": "operation-1613xxxx41-xxxxxxxx-xxxxxxxx-xxxxxxx",
    "producer": "compute.googleapis.com",
    "last": true
  },
  "receiveTimestamp": "2021-02-xxTxx:xx:xx.569578819Z"
}