问为什么Meteor会抱怨集合的insert方法已经定义好了？

EN

Error: A method named '/players/insert' is already defined 

###
Set up a collection to contain player information. On the server,
it is backed by a MongoDB collection named "players."
###
Players = new Meteor.Collection("players")

if Meteor.is_client
  Template.leaderboard.players = ->
    Players.find({}, {sort: {score: -1, name: 1}})

  Template.leaderboard.selected_name = ->
    player = Players.findOne(Session.get "selected_player")
    player and player.name

  Template.player.selected = -> if Session.equals("selected_player", this._id) then "selected" else ''

  Template.leaderboard.events = {
    'click input.inc': ->
      Players.update(Session.get("selected_player"), {$inc: {score: 5}})
  }

  Template.player.events = {
    'click': ->
      Session.set("selected_player", this._id)
  }

# On server startup, create some players if the database is empty.
if Meteor.is_server
  Meteor.startup ->
    if Players.find().count() is 0
      names = [
                "Ada Lovelace"
                "Grace Hopper"
                "Marie Curie"
                "Carl Friedrich Gauss"
                "Nikola Tesla"
                "Claude Shannon"
              ]
      Players.insert({name: name, score: Math.floor(Math.random()*10)*5}) for name in names

[[[[[ ~/dev/meteor/leaderboard ]]]]]

Running on: http://localhost:3000/

node.js:201
        throw e; // process.nextTick error, or 'error' event on first tick
              ^
Error: A method named '/players/insert' is already defined
    at app/packages/livedata/livedata_server.js:744:15
    at Function.<anonymous> (app/packages/underscore/underscore.js:84:24)
    at [object Object].methods (app/packages/livedata/livedata_server.js:742:7)
    at new <anonymous> (app/packages/mongo-livedata/collection.js:111:13)
    at app/leaderboard.js:4:11
    at /Users/alex/dev/meteor/leaderboard/.meteor/local/build/server/server.js:109:21
    at Array.forEach (native)
    at Function.<anonymous> (/Users/alex/dev/meteor/leaderboard/.meteor/local/build/server/underscore.js:76:11)
    at /Users/alex/dev/meteor/leaderboard/.meteor/local/build/server/server.js:95:7
Exited with code: 1