Releases and additional fields option JIRA automation

[Alexandr Trifonov]

I'm trying to find newest release with  no-empty release Date and copy it to Fix Version/s field

{
  "actions": [
    {
      "limit": 1,
      "query": {
        "type": "Release",
        "status": "Released",
        "releaseDate": {
          "$isNotEmpty": true
        }
      }
    },
    {
      "then": [
        {
          "copy": {
            "from": "result[0]",
            "to": "issue.fields.fixVersions"
          }
        }
      ]
    }
  ]
}

I've got an error:
No fields or field values to edit for issues

I'm tryed issue.fields.fixVersions and issue.fields.fixVersion both. What's wrong?