I have use case that

I create custom data with ini file for input data by user for new device by get value from message box example device_group and user input “north”

and I have import custom attribute for existing device example device_group  “north” , “south”

so, finally I want to update between  custom_data and custom_attribute

Copy %customAttr:device_group% to %CustomData:device_group% 

and

Copy %CustomData:device_group% to %customAttr:device_group%