Are you referring to Windows computers? Lansweeper cannot detect Windows computer name or domain name changes. Currently, the correct way to rename a computer or move it to a different domain is to first rename/move it in Lansweeper and then rename/move the machine itself. You can rename/move a computer by browsing to its Lansweeper webpage and then hitting the Edit Asset button. When the machine is rescanned, its existing database entry will then simply be updated. If you don’t rename/move the machine in Lansweeper first, a new database entry will be generated for it.
We've been considering implementing an automatic rename procedure based on MAC address, but duplicate MACs are not an uncommon occurrence, particularly on virtual machines.