Mongodb document rename field not working

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Javascript

MongoDB

JSONiq

{
  "General": {
    "Setting": [
      {
        "Name": {
          "MetaData": {
            "type": "bool"
          }
        }
      },
      {
        "Name": {
          "MetaData": {
            "type": "bool"
          }
        }
      },
      {
        "Name": {
          "MetaData": {
            "type": "bool"
          }
        }
      }
    ]
  }
}

i have the above document i need to update General.Setting.[index].Name.MetaData.type to General.Setting.[index].Name.MetaData.Newtype

What I have tried:

i did tried using this query :
1st approach:
doc.forEach( function(d) {
var settingsCollectionJSON = d.General.Setting;
settingsCollectionJSON.forEach( function(temp) {
var settingsCollectionJSONobj = temp.Name.MetaData.Localizable;
db.getCollection('SettingCollection').update(temp, { $rename: { "Name.MetaData.type": "Name.MetaData.Newtype" } })
})

})

2nd approach using $set and $unset.
//db.getCollection('SettingCollection').update(temp, { $set:{'MetaData.0.type':settingsCollectionJSONobj}, $unset: {'MetaData.0.Newtype':1} })

but for both these i'm not getting updated.can i have any solution?