How to reset security router without losing WAN configuration?

Zyxel_Jerry

Navigate to Organization-wide > License & inventory
And follow the below steps: 
Please remove the device from the site and then add it back on the Nebula page.

This process will reset the device and allow Nebula to push the configuration again without affecting the WAN settings.

To remove the device:

Select the device and choose Change Site Assignment.

Click Remove selected device(s) from their current site.

To add the device back:

Select Change Site Assignment again to assign the device to original site.