BIG IP LTM Slave Configuration

While Configuring slave i am able to create device group but, i am not able to add devices to that group using Rest API.

 

I am using below URI My Group name is :: myGroup

 

~myGroup/devices

 

Body is:: {"items":[{"name": "bigip11.my.com"},{"name":"bigip2.my.com"}]}

 

Method :: POST

 

Getting below Error ::

 

{"code": 403,"message": "Operation is not supported on property /cm/device-group/~Common~myGroup/devices.","errorStack":[],"apiError": 1}

 

Anyone is having any solution to this.Please let me know.