The following error message indicates that an attempt to use the dladm reset-linkprop command failed.
dladm: warning: cannot reset link property 'zone' on 'net0': operation failed
See Managing Datalinks Related to Zones. The running zone excl is using the device.
To reset the value, do the following:
Type the following command:
global$ ipadm delete-ip net0
Rerun the dladm command.