openguass2.0.1版本单机扩备机时提示[GAUSS-50110] : Cannot execute this script on omm02, which is not primary.

omm02已经按主模式启动：
gs_ctl start -D /gaussdb/data/db1 -M primary
[omm@omm02 ~]$ gs_om -t status --all

cluster_state : Normal
redistributing : No

node : 1
node_name : omm02
instance_id : 6001
node_ip : 192.168.52.143
data_path : /gaussdb/data/db1
type : Datanode
instance_state : Normal
az_name : AZ1
instance_role : Normal

[omm@omm02 ~]$ exit
logout
[root@omm02 script]# ./gs_expansion -U omm -G dbgrp -X cluster.xml -h 192.168.52.144 -L
[GAUSS-50110] : Cannot execute this script on omm02, which is not primary.
主库需要怎么设置才行？