老师您好 我用的 MongoDB4.0 rs。add 命令有问题

imooc:PRIMARY> rs.add({_id:1,host:"192.168.65.129:28002"})

{

     "operationTime" : Timestamp(1540203228, 1),

     "ok" : 0,

     "errmsg" : "Our config version of 2 is no larger than the version on 192.168.65.129:28002, which is 2",

     "code" : 103,

     "codeName" : "NewReplicaSetConfigurationIncompatible",

     "$clusterTime" : {

         "clusterTime" : Timestamp(1540203228, 1),

         "signature" : {

             "hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),

             "keyId" : NumberLong(0)

         }

     }

}

imooc:PRIMARY> rs.add({"192.168.65.129:28002"})

2018-10-22T18:26:02.800+0800 E QUERY    [js] SyntaxError: missing : after property id @(shell):1:30

imooc:PRIMARY> 

 请问老师 这个命令应该怎么写呀