Network device serials are pulled from the SNMP protocol on the device itself. No other customers have reported this issue as far as I know, but I assume SNMP itself is providing incorrect data. This is something you can verify with the Devicetester.exe tool found in Program Files (x86)\Lansweeper\Actions on your Lansweeper server. Unfortunately, there is not much we can do if SNMP itself is providing incorrect data. You can manually override scanned serials though, by hitting the Edit Asset button on individual asset pages, and rescan warranties in the Configuration\Server Options section of the web console.