He means you need to install the exact same version that the backup is from, on your new ZD1100 so it can be recognized.
Can you tell us what firmware version your ZD110 was running, that you saved your last backup from, before it went faulty?
You'll find the ZD1100 software downloads to match, from this Products page link. https://support.ruckuswireless.com/products/29-zonedirector-1100#firmwares
If the version on the new ZD is after your previous ZD version, using the Upgrade page to (downgrade) to a lower version,
will also reset configuration to factory settings. (so you know and can re-access it on the same version as your previous).