MongoDB '无法为$geoNear查询创建2dsphere索引和查找索引

My collection

{"_id" : ObjectId("58240d6eb3fe299a1f28bdf0"),
    "id" : NumberLong(52),
    "user_id" : NumberLong(2),
    "user_type" : "user",
    "type_id" : "399278",
    "type" : "poi",
    "type_name" : "Kala Ghoda Amphitheatre",
    "attending" : NumberLong(0),
    "domain" : "",
    "track_time" : "0000-00-00 00:00:00",
    "latitude" : "18.92728500",
    "longitude" : "72.83274200",
    "fb_postid" : "",
    "event_date" : "0000-00-00",
    "m_event_date" : NumberLong("-62169984000"),
    "m_type_id" : "poi__399278",
    "loc" : {
        "type" : "Point",
        "coordinates" : [
            18.927285,
            72.832742
        ]
    }

创建索引 db.user_tracking。ensureIndex({" location "; 2sphere "})

我有这个错误:

"ok" : 0,
"errmsg" : "Can't extract geo keys: { _id: ObjectId('58240d6eb3fe299a1f28bdf1'), id: 84, user_id: 2, user_type: '"wcities'", type_id: '"23621'", type: '"poi'", type_name: '"Alcatraz Island'", attending: 1, domain: '"Parrot'", track_time: '"2015-02-02 06:33:34'", latitude: '"37.82668800'", longitude: '"-122.42302500'", fb_postid: '"'", event_date: '"0000-00-00'", m_event_date: -62169984000, m_type_id: '"poi__23621'", loc: { type: '"Point'", coordinates: [ 37.826688, -122.423025 ] } }  longitude/latitude is out of bounds, lng: 37.8267 lat: -122.423",
"code" : 16755
}