If you did a factory reset of your system (hold two buttons face buttons down during power up), this will remove all Z-Wave devices and sensor programming.
Z-Wave devices will need to be cleared first, then re-added to the network. Once the devices are added back in, you will need to run a network rediscovery. The below guide will walk you through all the necessary steps:
Additionally, this guide here covers the basics of setting up a Z-Wave Network:
Wireless Sensor programming guides can be found here if necessary: