Package.json: Duplicate but different entries for platforms in `cordovaPlatforms`

Just noticed that my platforms are twice listed in my package.json in the cordovaPlatforms fiels:

{
  "cordovaPlatforms": [
    "ios",
    {
      "platform": "ios",
      "version": "",
      "locator": "ios"
    }
  ]
}

Anybody knows how this happens?
Is this a problem or should I just ignore it?
Can I delete one of the two entries? Which one should I delete?