Replace a Coordinator under 802.15.4 network

I m using S2C to setup a network using the 802.15.4 under XCTU.
Could anyone tell me if I lost the coordinator and looking forward to replace a new one?
Are there any guideline showing how to setup this new Coordinator?

Or I must to use the Zigbee network set up in the XCTU? If so, Could anyone provide a guilde here?

Best Regards

On the 802.15.4, it is nothing more than setting the same PAN ID, channel, DL/DH, MY, CE, and A2 settings as your old coordinator. Then swap them.